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Sample records for banded sleeve gastrectomy

  1. Case for sleeve gastrectomy.

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    Corcelles, Ricard; Lacy, Antonio

    2016-07-01

    During the last 10 years, laparoscopic sleeve gastrectomy (LSG) has progressively increased in popularity as a primary procedure because of its simplicity, safety, and effectiveness to achieve sustained weight loss over time. The efficacy of LSG in the metabolic control of type 2 diabetes (T2D) is the result of various mechanisms not thoroughly elucidated. Thus, excellent short-term outcomes have been published in glycemic control after SG at comparable rates to Roux-en-Y gastric bypass (RYGB). Unfortunately, head-to-head comparative studies between SG and RYGB are limited and long-term follow-up data is not abundant. The aim of this manuscript is to describe current evidence on the clinical impact of SG on T2D as well as to provide a critical appraisal of the available published data. PMID:27568474

  2. The influence of laparoscopic adjustable gastric banding and laparoscopic sleeve gastrectomy on weight loss, plasma ghrelin, insulin, glucose and lipids

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    Hady Razak Hady

    2012-07-01

    Full Text Available The aim of this study was to assess the impact of laparoscopic gastric banding and laparoscopic sleeve gastrectomy on the concentration of ghrelin, insulin, glucose, triglycerides, total and HDL-cholesterol, as well as AST and ALT levels in plasma in patients with obesity. The research includes 200 patients operated using LAGB (34 men average age 37.0 ± 12.6 years and 66 women average age 39.18 ± 12.17 years and LSG (48 men average age 47.93 ± 9.24 years and 52 women, 19 ± 9.33 years. The percentage of effective weight loss, effective BMI loss, concentration of ghrelin, insulin, glucose, triglycerides, total cholesterol, HDL-cholesterol, LDL-cholesterol, ALT, AST and HOMA IR values was taken preoperatively and at 7th day, 1 month, 3 and 6 months after surgery. Both after LSG and after LAGB, statistically significant reduction in BMI, serum insulin, glucose and HOMA IR was noticed in comparison to the preoperative values. Post LAGB, patients showed an increase of ghrelin, while LSG proved ghrelin decreased. Correlations between glucose and BMI loss, and between insulin and BMI loss in both cases are more favorable in the LSG group. Lipid parameters, AST and ALT have undergone declines or  increases in the particular time points. Both techniques cause weight loss and this way lead to changes in the concentration of ghrelin, as well as to the improvement of insulin, glucose, cholesterol and triglycerides metabolism. They reduce metabolic syndrome and multiple comorbidities of obesity.

  3. Laparoscopic sleeve gastrectomy in a pediatric patient.

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    Garness, Rachel L; Zarroug, Abdalla E; Kumar, Seema; Swain, James M

    2012-04-01

    Laparoscopic sleeve gastrectomy (LSG) is a novel technique in pediatric bariatric surgery. The patient reported here participated in our pediatric weight management clinic for 2 years. His obesity was complicated by obstructive sleep apnea, acanthosis nigricans, and hypertension. His past medical history included 2 small bowel resections, bilateral nephrectomy and kidney transplantation for multicystic renal dysplasia, and 2 peritoneal dialysis-catheter infections. Gastric banding was contraindicated because of previous foreign body infections and chronic need of immunosuppression and steroids. Roux-en-Y gastric bypass was of higher risk given his previous abdominal operations and the resulting medication absorption issues. He underwent LSG without any complications. Five trocars were utilized and a gastroscope was placed during gastric resection. Presurgical body mass index was 44.8 kg/m. At 18 months follow-up body mass index was 26.5 kg/m. We concur that LSG can be a safe and effective alternative in bariatric surgery in well-selected adolescents. PMID:22487636

  4. An audit to determine if vitamin b12 supplementation is necessary after sleeve gastrectomy

    OpenAIRE

    Eltweri, Amar M.; Bowrey, David J.; Christopher D Sutton; Graham, Lisa; Williams, Robert N

    2013-01-01

    Abstract Sleeve gastrectomy has increased in popularity over the last five years and it is likely to supersede gastric banding. Nevertheless, it is unclear whether vitamin B12 supplementation is required after surgery. The aim of this short report is to identify any vitamin B12 deficiency and highlight the necessity of post laparoscopic sleeve gastrectomy vitamin B12 monitoring. Patients and methods A review of 66 patients underwent LSG in our institution. 25 patients were excluded as they ha...

  5. Safety Evaluation of Laparoscopic Sleeve Gastrectomy Compared with Two Procedures of Laparoscopic Roux-en-Y Gastric Bypass and Laparoscopic Adjustable Gastric Banding for Individuals with Morbid Obesity: A Systemic Review

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    F Arabi Basharic

    2015-10-01

    Full Text Available Introduction: Laparoscopic Roux-en-Y gastric bypass and laparoscopic adjustable gastric banding are the most common bariatric surgery procedures. Therefore, this study aims to compare the safety of the newer procedure of Laparoscopic sleeve gastrectomy compared to Laparoscopic Roux-en-Y gastric bypass and Laparoscopic adjustable gastric bonding. Method: A systematic review was conducted on the most important and most relevant search data bases, including Cochrane library, Pubmed, Ovid Medline as well as Iranian sites of Magiran , Iranmedex , SID, not taking the time limit into consideration. The results found in the literature were classified and were then analyzed. Results: Out of 384 articles obtained in the search, 4 randomized clinical trials (RCT were included in this study. There were no reports of death comparing surgical procedures of Roux-en-Y gastric bypass and sleeve gastrectomy. Moreover, in adjustable gastric banding and Roux-en-Y gastric bypass comparison, one death was observed in each group. Regarding the side effects of Roux-en-Y gastric bypass and sleeve gastrectomy, 10% early complications were reported in the Roux-en-Y gastric  bypass group , and 13% were observed in the sleeve gastrectomy group between which no statistically significant difference was revealed. The comparison between adjustable gastric banding and Roux-en-Y gastric bypass demonstrated that the occurrence of early and late complications was reported to be higher in the gastric bypass group, though no statistically significant difference was observed. Conclusion: The present study findings demonstrated no statistically significant difference between these methods in regard with the safety aspect. As a result, selection as well as success of the bariatric surgery procedures depend on the patient's and surgeon's preferences.

  6. Changes in problematic and disordered eating after gastric bypass, adjustable gastric banding and vertical sleeve gastrectomy: a systematic review of pre-post studies.

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    Opozda, M; Chur-Hansen, A; Wittert, G

    2016-08-01

    Despite differences in their mechanisms and outcomes, little is known about whether postsurgical changes in eating behaviours also differ by bariatric procedure. Following a systematic search, 23 studies on changes in binge eating disorder (BED) and related behaviours, bulimia nervosa and related behaviours, night eating syndrome, grazing and emotional eating after Roux-en-Y gastric bypass (RYGB), adjustable gastric banding (AGB) and vertical sleeve gastrectomy (VSG) were reviewed. Significant methodological problems and a dearth of literature regarding many behaviours and VSG were seen. Regarding BED and related behaviours, although later re-increases were noted, short to medium-term reductions after RYGB were common, and reported changes after AGB were inconsistent. Short to medium-term reductions in emotional eating, and from a few studies, short to long-term reductions in bulimic symptoms, were reported after RYGB. Reoccurrences and new occurrences of problem and disordered eating, especially BED and binge episodes, were apparent after RYGB and AGB. Further conclusions and comparisons could not be made because of limited or low-quality evidence. Long-term comparison studies of changes to problematic and disordered eating in RYGB, AGB and VSG patients are needed. It is currently unclear whether any bariatric procedure leads to long-term improvement of any problematic or disordered eating behaviours. PMID:27296934

  7. Carbon dioxide embolism during laparoscopic sleeve gastrectomy

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    Amir Abu Zikry

    2011-01-01

    Full Text Available Bariatric restrictive and malabsorptive operations are being carried out in most countries laparoscopically. Carbon dioxide or gas embolism has never been reported in obese patients undergoing bariatric surgery. We report a case of carbon dioxide embolism during laparoscopic sleeve gastrectomy (LSG in a young super obese female patient. Early diagnosis and successful management of this complication are discussed. An 18-year-old super obese female patient with enlarged fatty liver underwent LSG under general anesthesia. During initial intra-peritoneal insufflation with CO 2 at high flows through upper left quadrant of the abdomen, she had precipitous fall of end-tidal CO 2 and SaO 2 % accompanied with tachycardia. Early suspicion led to stoppage of further insufflation. Clinical parameters were stabilized after almost 30 min, while the blood gas analysis was restored to normal levels after 1 h. The area of gas entrainment on the damaged liver was recognized by the surgeon and sealed and the surgery was successfully carried out uneventfully. Like any other laparoscopic surgery, carbon dioxide embolism can occur during bariatric laparoscopic surgery also. Caution should be exercised when Veress needle is inserted through upper left quadrant of the abdomen in patients with enlarged liver. A high degree of suspicion and prompt collaboration between the surgeon and anesthetist can lead to complete recovery from this potentially fatal complication.

  8. Effects of sleeve gastrectomy on insulin resistance

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    CĂTOI, ADRIANA FLORINELA; PÂRVU, ALINA; MIRONIUC, AUREL; GALEA, ROMEO FLORIN; MUREŞAN, ADRIANA; BIDIAN, CRISTINA; POP, IOANA

    2016-01-01

    Background and aim Obesity is a major risk factor for the onset of insulin resistance (IR), hyperinsulinemia and type 2 diabetes mellitus (T2DM) Evidence data has proven that beyond important weight loss bariatric surgery especially Roux-en-Y gastric bypass (RYGB) and bilio-pancreatic diversion (BPD) leads to significant early reduction of insulinemia and of IR calculated through the homeostatic model assessment (HOMA-IR), independently of fat mass decrease. Sleeve gastrectomy (SG) is now used as a sole weight loss operation with good results. Therefore, the aim of the present study was to investigate the early changes of fasting blood glucose, insulin and HOMA-IR in a group of morbidly obese (MO) patients i.e. at 7, 30 and 90 days after SG. Methods The study included 20 MO patients (7 male and 13 female) submitted to SG. Anthropometrical (weight, body mass index –BMI, percent excess BMI loss -%EBMIL) and biochemical (plasma glucose, insulin and calculated HOMA-IR ) evaluation were performed before and at 7, 30 and 90 days after SG. In addition, a second group of 10 normal weight healthy subjects with a BMI ranging form 19 kg/m2 to 23.14 kg/m2, matched for age and gender was investigated. Results Plasma glucose (p=0.018), insulin (p=0.004) and HOMA-IR (p=0.006) values were statistically different between the studied groups. After surgery, at every follow-up point, there were statistically different weight and BMI mean values relative to the operation day (p<0.003). BMI, decreased at 7 days (estimated reduction=2.79; 95% CI:[2.12;3.45]), at 30 days (estimated reduction=5.65; 95% CI:[3.57;7.73]) and at 90 days (estimated reduction=10.88; 95% CI:[7.35;14.41]) respectively after SG. We noted a tendency toward statistical significant change of mean insulin values at 7 days after surgery (corrected p=0.075), no statistical change at 30 days (corrected p=0.327) and a significant change at 90 days (corrected p=0.027) after SG as compared to baseline. There was a

  9. Association between postprandial symptoms and gastric emptying after sleeve gastrectomy

    NARCIS (Netherlands)

    Burgerhart, J.S.; Rutte, P.W. van; Edelbroek, M.A.; Wyndaele, D.N.; Smulders, J.F.; Meeberg, P.C. van de; Siersema, P.D.; Smout, A.J.P.M.

    2015-01-01

    BACKGROUND: Laparoscopic sleeve gastrectomy (LSG) is an effective bariatric procedure. However, postprandial symptoms can compromise its beneficial effect. It is not known if a changed gastric emptying and these symptoms are related. This study aimed to assess the association between postprandial sy

  10. Prosthetic Bioabsorbable Mesh for Hiatal Hernia Repair During Sleeve Gastrectomy

    OpenAIRE

    Clapp, Benjamin

    2013-01-01

    Background and Objectives: Laparoscopic sleeve gastrectomy has become a valuable primary bariatric operation. It has an acceptable complication profile and amount of weight loss. However, one of the most distressing complications to the patient is reflux postoperatively. There is thought to be a relationship between a hiatal hernia and postoperative reflux. There is disagreement on how to address a hiatal hernia intraoperatively, and the use of mesh is controversial. Our objectives were to ex...

  11. Chronic Gastritis in Morbidly Obese Patients with Sleeve Gastrectomy

    OpenAIRE

    Makki, Ahmed Mohammad; Aldaqal, Saleh Mohammad; Alorabi, Shahad Hamadan; Nemri, Ismail Ahmed; Alajami, Maha Mohammad

    2016-01-01

    Introduction Obesity is a condition that has significant impact on public health. Recent exciting studies have linked chronic gastritis and H. pylori infection to obesity. Chronic gastritis has shown increased prevalence in obesity, more particularly H. pylori-related gastritis. This study aimed to determine the prevalence of chronic gastritis in morbidly obese patients who were subjected to sleeve gastrectomy, with focus on H. pylori-related gastritis. The aim was to demonstrate any influenc...

  12. Severe Insulin Resistance Improves Immediately After Sleeve Gastrectomy.

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    Sharma, Rahul; Hassan, Chandra; Chaiban, Joumana T

    2016-01-01

    Introduction. Obese individuals exhibit insulin resistance often leading to adverse health outcomes. When compared with intensive medical therapy, bariatric surgery has shown better outcomes mainly in terms of insulin resistance and glycemic control. Using the Homeostasis Model Assessment of insulin resistance (HOMA-IR), we report herein a case illustrating a drastic improvement in severe insulin resistance after sleeve gastrectomy in the immediate postoperative period. Case Report. A patient with long-standing history of morbid obesity, type 2 diabetes, obstructive sleep apnea, hypertension, and severe insulin resistance (requiring approximately 2 units of insulin per kg per day) was enrolled in the medical weight management program for 6 months during which he lost 40 lbs and his insulin requirements decreased. He then underwent a sleeve gastrectomy and did not require insulin therapy as of postoperative day 1. His HOMA-IR improved by about 76% between day 1 and day 14 postoperatively. Conclusion. Sleeve gastrectomy leads to a drastic improvement in severe insulin resistance as early as the first postoperative day. PMID:26788532

  13. Lithium Toxicity Following Vertical Sleeve Gastrectomy: A Case Report.

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    Alam, Abdulkader; Raouf, Sherief; Recio, Fernando O

    2016-08-31

    We are presenting the first documented case of lithium toxicity after vertical sleeve gastrectomy surgery in an 18 year-old female with psychiatric history of bipolar disorder who was treated with lithium. This case illustrates the need for closer monitoring of lithium levels following bariatric surgery. Both psychiatrists and surgeons should be aware of the potential risk of lithium toxicity following bariatric surgery, as well as the need to judiciously monitor lithium level and possibly adjust the dose of some medications. PMID:27489390

  14. De novo gastric adenocarcinoma 1 year after sleeve gastrectomy in a transplant patient

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    M. Masrur

    2016-01-01

    Conclusions: No direct relation has been established between sleeve gastrectomy and the development of gastric cancer. Robotic procedures allow for complex multiorgan resections, while preserving the benefits of minimally invasive surgery.

  15. Comparison of four different methods in staple line reinforcement during laparascopic sleeve gastrectomy

    OpenAIRE

    Bülbüller, Nurullah; Aslaner, Arif; Öner, Osman Zekai; Oruç, Mehmet Tahir; Koç, Ümit; Öngen, Nuray Ayper; Eryılmaz, Ramazan; Cantilav, Güvenç; Habibi, Mani; Özdemir, Şükrü

    2013-01-01

    The main early complications of Laparascopic Sleeve Gastrectomy are bleeding and gastric leakage. Many reinforcement methods are performed in order to reduce these complications. In this prospective, randomized study, we compared four different techniques to evaluate staple line reinforcement in Laparascopic Sleeve Gastrectomy. Between January 2012 and May 2013, 65 patients were prospectively randomized into four groups in which different techniques were used in handling the staple line durin...

  16. Portal Vein Thrombosis due to Prothrombin Gene Mutation following Sleeve Gastrectomy

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    Murad Baba; Jordan Fakhoury; Amer Syed

    2015-01-01

    Introduction. Portomesenteric thrombosis is increasingly recognized as a complication of laparoscopic sleeve gastrectomy (LSG). It often presents with abdominal pain. We present a mother and her son who both developed portal vein thrombosis (PVT) after LSG. Case Description. A 43-year-old woman presented complaining of sudden severe abdominal pain, two weeks after she had uncomplicated laparoscopic sleeve gastrectomy. CT scan of the abdomen and pelvis with IV contrast showed portal vein throm...

  17. The pathological findings seen in laparoscopic sleeve gastrectomies for weight loss.

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    Miller, Gregory C; Reid, Andrew S; Brown, Ian S

    2016-04-01

    Sleeve gastrectomy specimens are increasingly common surgical specimens received for examination following bariatric surgery for weight loss. The spectrum of pathological changes seen in these cases is not well documented. Retrospective examination was undertaken of 1463 consecutive sleeve gastrectomy specimens received at Envoi Specialist Pathologists. Most cases showed no pathological changes (80.2%). The most common changes seen were non-specific, non-Helicobacter associated chronic gastritis (7.2%), Helicobacter associated gastritis (6.8%) and benign fundic gland polyps (4.0%). Other, rarer changes were lymphocytic gastritis, autoimmune atrophic gastritis, chronic gastritis with intestinal metaplasia, hyperplastic polyps, pancreatic heterotopia, gastrointestinal stromal tumours (GISTs) and a leiomyoma. A wide range of pathological changes are seen in resection specimens following sleeve gastrectomies for weight loss. Many cases will require further treatment or ongoing investigation and surveillance. PMID:27020497

  18. Gastric remnant twist in the immediate post-operative period following laparoscopic sleeve gastrectomy.

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    Subhas, Gokulakkrishna; Gupta, Anupam; Sabir, Mubashir; Mittal, Vijay K

    2015-11-27

    Twist of stomach remnant post sleeve gastrectomy is a rare entity and difficult to diagnose pre-operatively. We are reporting a case of gastric volvulus post laparoscopic sleeve gastrectomy, which was managed conservatively. A 38-year-old lady with a body mass index of 54 underwent laparoscopic sleeve gastrectomy. Sleeve gastrectomy was performed over a 32 French bougie using Endo-GIA tri-stapler. On post-operative day 1, patient had nausea and non-bilious vomiting. An upper gastrointestinal gastrografin study on post-operative days 1 and 2 revealed collection of contrast in the fundic area of stomach with poor flow distally, and she vomited gastrograffin immediately post procedure. With the suspicion of a stricture in the mid stomach as the cause, the patient was taken back for a exploratory laparoscopy and intra-operative endoscopy. We found a twist in the gastric tube which was too tight for the endoscope to pass through. This was managed conservatively with a long stent to keep the gastric tube straight and patent. The stent was discontinued in 7 d and the patient did well. In laparoscopic sleeve gastrectomy the stomach is converted into a tube and is devoid of its supports. If the staples fired are not aligned appropriately, it can predispose this stomach tube to undergo torsion along its long axis. Such a twist can be avoided by properly aligning the staples and by placing tacking sutures to the omentum and new stomach tube. This twist is a functional obstruction rather than a stricture; thus, it can be managed by endoscopy and stent placement. PMID:26649158

  19. Portal Vein Thrombosis due to Prothrombin Gene Mutation following Sleeve Gastrectomy

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    Murad Baba

    2015-01-01

    Full Text Available Introduction. Portomesenteric thrombosis is increasingly recognized as a complication of laparoscopic sleeve gastrectomy (LSG. It often presents with abdominal pain. We present a mother and her son who both developed portal vein thrombosis (PVT after LSG. Case Description. A 43-year-old woman presented complaining of sudden severe abdominal pain, two weeks after she had uncomplicated laparoscopic sleeve gastrectomy. CT scan of the abdomen and pelvis with IV contrast showed portal vein thrombosis and SMV thrombosis. Two weeks later her son had the same LSG for morbid obesity and presented with the same clinical picture. Thrombophilia workup showed heterozygous prothrombin gene mutation. Conclusions. A high index of suspicion is necessary to diagnose PVT; although rare, it can be potentially lethal. Anticoagulation therapy should be initiated immediately to limit the morbidities and improve the outcome. Patients with family history of thrombophilia should be investigated prior to any bariatric surgery and nonsurgical alternative treatments for morbid obesity should be strongly encouraged.

  20. Metabolic and histopathological effects of sleeve gastrectomy and gastric plication: an experimental rodent model

    OpenAIRE

    Osman Bilgin Gulcicek; Kamil Ozdogan; Ali Solmaz; Hakan Yigitbas; Serdar Altınay; Aysegul Gunes; Duygu Sultan Celik; Erkan Yavuz; Atilla Celik; Fatih Celebi

    2016-01-01

    Introduction: Obesity has recently become a major health problem, and researchers have been directed to work toward the development of surgical techniques, with new mediators playing an important role in nutrition. Gastric plication (GP) and sleeve gastrectomy (SG) have become popular recently. These are widely used techniques in bariatric surgery. Objectives: In this study, we aimed to compare the efficiency of SG and GP techniques on rats. Methods: Wistar-Hannover rats (n=18) were divided i...

  1. Metabolic and histopathological effects of sleeve gastrectomy and gastric plication: an experimental rodent model

    OpenAIRE

    Gulcicek, Osman Bilgin; Ozdogan, Kamil; Solmaz, Ali; Yigitbas, Hakan; Altınay, Serdar; Gunes, Aysegul; Celik, Duygu Sultan; Yavuz, Erkan; Celik, Atilla; Celebi, Fatih

    2016-01-01

    Introduction: Obesity has recently become a major health problem, and researchers have been directed to work toward the development of surgical techniques, with new mediators playing an important role in nutrition. Gastric plication (GP) and sleeve gastrectomy (SG) have become popular recently. These are widely used techniques in bariatric surgery.Objectives: In this study, we aimed to compare the efficiency of SG and GP techniques on rats.Methods: Wistar-Hannover rats (n=18) were divided int...

  2. Portomesenteric venous thrombosis after laparoscopic sleeve gastrectomy: A case report and a call for prevention

    OpenAIRE

    Parveen Bhatia; Suviraj J John; Sudhir Kalhan; Vivek Bindal

    2015-01-01

    Postoperative portomesenteric venous thrombosis (PMVT) is being increasingly reported after bariatric surgery. It is variable and often a nonspecific presentation along with its potential for life-threatening and life-altering outcomes makes it imperative that it is prevented, detected early and treated optimally. We report the case of a 50-year-old morbidly obese man undergoing a laparoscopic sleeve gastrectomy who developed symptomatic PMVT two weeks postsurgery, which was successfully trea...

  3. LAPAROSCOPIC SLEEVE GASTRECTOMY IN THE TREATMENT OF OBESITY – CASE REPORT

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    L. Alecu (1, (1,(1, (2,(2

    2013-03-01

    Full Text Available Starting from a case that we operated in our clinic, the paper takes into discussion the aspects regarding the use of laparoscopic sleeve gastrectomy in the treatment of obesity. We present a 39 year-old woman with morbid obesity and gallstones (206 kg weight, BMI of 70 kg/m2 who underwent a laparoscopic sleeve gastrectomy and cholecystectomy. The postoperative course was uneventful, the patient being discharged from the hospital 4 days after operation. Weight loss of the patient after operation was spectacular, with dropping the body weight to 93 kg during the first year after the laparoscopic procedure. Then, the excess abdominal skin was removed during three scheduled interventions in the Plastic Surgery Department. The first plastic surgery operation removed 4 kg of excess skin from her abdomen. CONCLUSIONS: Laparoscopic sleeve gastrectomy is a useful and efficient method in the treatment of morbid obesity with very good outcomes. Different plastic surgery procedures are necessary to remove the excess skin after the weight loss.

  4. A prospective study on inflammatory parameters in obese patients after sleeve gastrectomy.

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    Gumbau, Verónica; Bruna, Marcos; Canelles, Enrique; Guaita, Marcos; Mulas, Claudia; Basés, Carla; Celma, Isabel; Puche, Jose; Marcaida, Goitzane; Oviedo, Miguel; Vázquez, Antonio

    2014-06-01

    Different hormones and peptides involved in inflammation have been studied in and related to obesity. The aim of our work is to assess the variations of different molecules related to inflammation in obese patients during the first year following sleeve gastrectomy. This was a prospective study on patients who underwent sleeve gastrectomy. The variations in different clinical, anthropometric, and analytical parameters related to inflammation were determined and analysed in all patients at the preoperative visit and at the first and fifth days, first and sixth months, and 1 year following surgery. We enrolled 20 patients to the study. The median body mass index (BMI) before intervention was 48.5 kg/m2. With respect to comorbidities, 70% of the patients had obstructive sleep apnoea syndrome (OSA), 65% high blood pressure, 45% dyslipidaemia, and 40% diabetes mellitus (DM). The median percentage of BMI lost (%BMIL) 1 year after the intervention was 71%. The dyslipidaemia healing or improvement rate was 100%, whereas it was 87.5% for diabetes, 84.6% for hypertension, and 57.1% for OSA. During the 1-year postintervention period, the average levels of adiponectin increased, although not significantly, whereas those of leptin significantly decreased. In addition, the blood levels of MCP-1, IL-6, CRP, ferritin, and PAI-1 significantly decreased in that period. Sleeve gastrectomy is a surgical technique that is associated with improvements in body weight and comorbid conditions from the first postoperative months, which lead to significant variations in the levels of different inflammation-related parameters and a decrease in the levels of leptin, IL-6, CRP, MCP-1, ferritin, and serpin (PAI-1). PMID:24566661

  5. Effects of duodenal switch alone or in combination with sleeve gastrectomy on body weight and lipid metabolism in rats

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    Gudbrandsen, Oddrun Anita; Kodama, Yosuke; Mjøs, Svein Are; Zhao, Chun-Mei; Johannesen, Helene; Brattbakk, Hans-Richard; Haugen, Christine; Kulseng, Bård Eirik; Mellgren, Gunnar; Chen, Duan

    2014-01-01

    Background: A combined procedure of sleeve gastrectomy and duodenal switch (SG+DS) has been applied to the treatment of super obesity. The aim of the present study was to test whether duodenal switch alone (DS) leads to similar weight loss and changes in lipid metabolism as SG+DS. Methods: Male Sprague–Dawley rats underwent sham surgery (Sham, N=7), duodenal switch alone (DS, N=5) or sleeve gastrectomy followed by duodenal switch (SG+DS, N=5). Body weight, feed and water intakes, and ambul...

  6. Laparoscopic Sleeve Gastrectomy as a Primary Operation for Morbid Obesity: Experience with 200 Patients

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    Paolo Gentileschi

    2012-01-01

    Full Text Available Introduction. Laparoscopic sleeve gastrectomy (LSG represents a valid option for morbid obesity, either as a primary or as a staged procedure. The aim of this paper is to report the experience of a single surgeon with LSG as a standalone operation for morbid obesity. Methods. From April 2006 to April 2011, 200 patients underwent LSG for morbid obesity. Each patient record was registered and prospectively collected. In July 2011, a retrospective analysis was conducted. Results. Patients were 128 females and 72 males with a median age of 40.0 years. Median pre-operative BMI was 49.4 kg/m2. Median follow-up was 27.2 months. Median post-operative BMI was 30.4 kg/m2. Median %excess weight loss (%EWL was 63.6%. Median post-operative hospital stay was 4.0 days in the first 84 cases and 3.0 days in the last 116 cases. Six major post-operative complications occurred (3%: two gastric stump leaks (1%, three major bleedings (1.5% and 1 (0.5% bowel obstruction. One case of mortality was registered (0.5%. To date only 4 patients are still in the range of morbid obesity (BMI > 35 kg/m2. Conclusions. Laparoscopic sleeve gastrectomy is a formidable operation in the short-term period. Median %EWL in this series was 63.6% at 27.2 months follow-up.

  7. Secondary surgery after sleeve gastrectomy: Roux-en-Y gastric bypass or biliopancreatic diversion with duodenal switch

    NARCIS (Netherlands)

    Homan, J.; Betzel, B; Aarts, E.O.; Laarhoven, K.J. van; Janssen, I.M.C.; Berends, F.J.

    2015-01-01

    BACKGROUND: Laparoscopic sleeve gastrectomy (LSG) has gained popularity as a stand-alone procedure with good short-term results for weight loss. However, in the long-term, weight regain and other complications are reported. Demand for secondary surgery is rising, partly for these reasons. OBJECTIVES

  8. Portomesenteric venous thrombosis after laparoscopic sleeve gastrectomy: A case report and a call for prevention

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    Parveen Bhatia

    2015-01-01

    Full Text Available Postoperative portomesenteric venous thrombosis (PMVT is being increasingly reported after bariatric surgery. It is variable and often a nonspecific presentation along with its potential for life-threatening and life-altering outcomes makes it imperative that it is prevented, detected early and treated optimally. We report the case of a 50-year-old morbidly obese man undergoing a laparoscopic sleeve gastrectomy who developed symptomatic PMVT two weeks postsurgery, which was successfully treated by anticoagulant therapy. We provide postulates to the etiopathological mechanism for this thrombotic entity. The growing recognition that obesity and bariatric surgery create a procoagulant state regionally and systemically provides impetus for designing the ideal protocol for PMVT prophylaxis, which could be more common than currently believed. We support the early screening for PMVT in the postbariatric surgical patient with unexplainable or intractable abdominal symptoms. The role of routine surveillance and the ideal duration of post-PMVT anticoagulation is yet to be elucidated.

  9. The success of sleeve gastrectomy in the management of metabolic syndrome and obesity

    Institute of Scientific and Technical Information of China (English)

    Asim Shabbir; Dallan Dargan

    2015-01-01

    The rapid reversal of diabetes,hypertension,hyperlipidaemia and obesity by surgical means has challenged accepted doctrines regarding the management of metabolic syndrome.Sleeve gastrectomy,which developed initially as a preparatory procedure for biliopancreatic diversion with duodenal switch,has seen an exponential rise in popularity as an effective lone laparoscopic bariatric procedure.Superior excess weight loss,a low complication rate,and excellent food tolerance,combined with a short hospital stay,have made this the procedure of choice for patients and surgeons across the globe.High volume centres nurture the ongoing development of experienced and specialized teams,pathways and regimens.Optimum surgical outcomes allow minimization of metabolic syndrome,reducing cardiovascular and cerebrovascular risk.

  10. Determinants of Weight Loss following Laparoscopic Sleeve Gastrectomy: The Role of Psychological Burden, Coping Style, and Motivation to Undergo Surgery

    OpenAIRE

    Andrea Figura; Anne Ahnis; Andreas Stengel; Tobias Hofmann; Ulf Elbelt; Jürgen Ordemann; Matthias Rose

    2015-01-01

    Background. The amount of excess weight loss (%EWL) among obese patients after bariatric surgery varies greatly. However, reliable predictors have not been established yet. The present study evaluated the preoperative psychological burden, coping style, and motivation to lose weight as factors determining postoperative treatment success. Methods. The sample included 64 morbidly obese patients with a preoperative BMI of 51 ± 8 kg/m2 who had undergone laparoscopic sleeve gastrectomy (LSG). Well...

  11. High preoperative depression, phobic anxiety, and binge eating scores and low medium-term weight loss in sleeve gastrectomy obese patients: a preliminary cohort study. : Psychiatric factors and weight loss in obesity surgery

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    Brunault, Paul; Jacobi, David; Miknius, Vaïda; Bourbao-Tournois, Céline; Huten, Noël; Gaillard, Philippe; Couet, Charles; Camus, Vincent; Ballon, Nicolas

    2012-01-01

    OBJECTIVE: Although depression, anxiety, and binge eating are prevalent in candidates for bariatric surgery, their impact on weight loss is unknown following sleeve gastrectomy. This study assesses the associations between weight loss and preoperative depression, anxiety, and binge eating scores in patients undergoing sleeve gastrectomy for morbid obesity. METHOD: This cohort study included 34 patients who underwent sleeve gastrectomy for morbid obesity between May 2006 and February 2010 in a...

  12. CT-Guided Percutaneous Drainage of Infected Collections Due to Gastric Leak After Sleeve Gastrectomy for Morbid Obesity: Initial Experience

    International Nuclear Information System (INIS)

    This study was designed to evaluate the efficacy and safety of computed tomography (CT)-guided drainage in treating infected collections due to gastric leak after laparoscopic sleeve gastrectomy for morbid obesity. From January 2007 to June 2009, 21 patients (9 men and 12 women; mean age, 39.2 (range, 26–52) years) with infected collections due to gastric leak after laparoscopic sleeve gastrectomy for morbid obesity underwent image-guided percutaneous drainage. All procedures were performed using CT guidance and 8- to 12-Fr pigtail drainage catheters. Immediate technical success was achieved in all 21 infected collections. In 18 of 21 collections, we obtained progressive shrinkage of the collection with consequent clinical success (success rate 86%). In three cases, the abdominal fluid collection was not resolved, and the patients were reoperated. Among the 18 patients who avoided surgery, 2 needed replacement of the catheter due to obstruction. No major complications occurred during the procedure. The results of our study support that CT-guided percutaneous drainage is an effective and safe method to treat infected abdominal fluid collections due to gastric leak in patients who had previously underwent laparoscopic sleeve gastrectomy for morbid obesity. It may be considered both as a preparatory step for surgery and a valuable alternative to open surgery. Failure of the procedure does not, however, preclude a subsequent surgical operation.

  13. Melanocortin-4 receptor signaling is not required for short-term weight loss after sleeve gastrectomy in pediatric patients.

    Science.gov (United States)

    Jelin, E B; Daggag, H; Speer, A L; Hameed, N; Lessan, N; Barakat, M; Nadler, E P

    2016-03-01

    Homozygous or compound heterozygous melanocortin-4 receptor (MC4R) mutations are rare with fewer than 10 patients described in current literature. Here we report the short- and long-term outcomes for four children ages 4.5-14 who are homozygous for loss-of-function mutations in the MC4R and underwent laparoscopic sleeve gastrectomy. All four patients experienced significant weight loss and improvement in, or resolution of, their comorbidities in the short term. One patient, however, has had significant weight regain in the long term. We conclude that MC4R signaling is not required for short-term weight loss after laparoscopic sleeve gastrectomy in children. Behavior modification may be more important for long-term weight maintenance, but patients with homozygous MC4R deficiency should not be excluded from consideration for sleeve gastrectomy. However, as at least one copy of functional MC4R is necessary and sufficient to induce long-term postoperative weight loss benefits, patients with complete loss of MC4R functionality might be less likely to exhibit the same benefits resulting from bariatric surgery. PMID:26538186

  14. Metabolic and histopathological effects of sleeve gastrectomy and gastric plication: an experimental rodent model

    Science.gov (United States)

    Gulcicek, Osman Bilgin; Ozdogan, Kamil; Solmaz, Ali; Yigitbas, Hakan; Altınay, Serdar; Gunes, Aysegul; Celik, Duygu Sultan; Yavuz, Erkan; Celik, Atilla; Celebi, Fatih

    2016-01-01

    Introduction Obesity has recently become a major health problem, and researchers have been directed to work toward the development of surgical techniques, with new mediators playing an important role in nutrition. Gastric plication (GP) and sleeve gastrectomy (SG) have become popular recently. These are widely used techniques in bariatric surgery. Objectives In this study, we aimed to compare the efficiency of SG and GP techniques on rats. Methods Wistar-Hannover rats (n=18) were divided into three equal groups, namely SG, GP, and control. Blood samples were taken before the operation and on the 30th day after the operation. The weights of all rats were recorded both on first day and the 30th day after the operation. Serum gastrin, ghrelin, and leptin levels were also measured on the same days. For histopathological examination, gastrectomy was performed after the animals were sacrificed. Results Average weight loss was 10% for the SG group and 6.5% for the GP group. One month after the operations, the decrease in the ghrelin and leptin levels of GP and SG groups was significant compared with the levels of the control group. Gastrin levels of the SG group increased significantly compared with those of the control group. Histopathological examination revealed that there was significant decrease in the ghrelin and leptin levels of the GP and SG groups compared with those of the control group. Foveolar hyperplasia (FH), cystic glandular dilatation, and fibrosis were significantly higher in the GP and SG groups compared with the control group. Conclusion Although GP is not as effective as SG in terms of weight loss, it provides the same effectiveness in decreasing ghrelin and leptin levels. Histopathological findings revealed that FH, fibrosis, and the cystic glandular dilatation development rates were similar. PMID:27087477

  15. Sleeve Gastrectomy and Roux-en-Y Gastric Bypass Alter the Gut-Brain Communication

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    L. A. Ballsmider

    2015-01-01

    Full Text Available This study investigated the anatomical integrity of vagal innervation of the gastrointestinal tract following vertical sleeve gastrectomy (VSG and Roux-en-Y gastric bypass (RYGB operations. The retrograde tracer fast blue (FB was injected into the stomach to label vagal neurons originating from nodose ganglion (NG and dorsal motor nucleus of the vagus (DMV. Microglia activation was determined by quantifying changes in the fluorescent staining of hindbrain sections against an ionizing calcium adapter binding molecule 1 (Iba1. Reorganization of vagal afferents in the hindbrain was studied by fluorescent staining against isolectin 4 (IB4. The density of Iba1- and IB4-immunoreactivity was analyzed using Nikon Elements software. There was no difference in the number of FB-labeled neurons located in NG and DMV between VSG and VSG-sham rats. RYGB, but not RYGB-sham rats, showed a dramatic reduction in number of FB-labeled neurons located in the NG and DMV. VSG increased, while the RYGB operation decreased, the density of vagal afferents in the nucleus tractus solitarius (NTS. The RYGB operation, but not the VSG procedure, significantly activated microglia in the NTS and DMV. Results of this study show that the RYGB, but not the VSG procedure, triggers microglia activation in vagal structures and remodels gut-brain communication.

  16. Preventing staple-line leak in sleeve gastrectomy: reinforcement with bovine pericardium vs. oversewing.

    Science.gov (United States)

    Al Hajj, Georges Nabih; Haddad, Johnny

    2013-11-01

    One of the most serious, potentially life-threatening complications of laparoscopic sleeve gastrectomy (LSG) is staple-line leakage. Oversewing the LSG staple line vs buttressing it with bovine pericardial strips (BPS) to reduce perioperative bleeding and postoperative gastric leak was evaluated. From 2006 through 2011, 160 patients underwent LSG with suturing as the only staple-line reinforcement (Group A). From March 2010 through August 2012, 84 LSG patients had BPS incorporated into their last two stapler firings (Group B). Staple lines were evaluated perioperatively for bleeding, and patients were monitored for indications of staple-line leaks (peritonitis, abnormal output from the drain). In preoperative Group A and B, there were 117 (73.1%) vs. 56 (66.7%) females; mean age, 35.2 years (18.0-68.0) vs. 33.8 years (15.0-64.0); mean body mass index (BMI, kilograms per square meter), 42.5 (27.0-76.0) vs. 42.0 (30.0-58.0). Three months after surgery, mean BMI for Group A was 37.3 (-5.9); Group B, 35.2 (-7.3); at 6 months, 32.7 (-10.8) and 31.5 (-11.3; p barium swallow, occurred in eight Group A patients (5.0%); in Group B, one (1.2%; p = 0.17). Relative to oversewing, staple-line buttressing with bovine pericardium was readily accomplished, safe, and associated with a lower staple-line leak rate. PMID:23975327

  17. Influence of Sleeve Gastrectomy on NASH and Type 2 Diabetes Mellitus

    Directory of Open Access Journals (Sweden)

    W. K. Karcz

    2011-01-01

    Full Text Available Background. Nonalcoholic fatty liver disease is present in up to 85% of adipose patients and may proceed to nonalcoholic steatohepatitis (NASH. With insulin resistance and obesity being the main risk factors for NASH, the effect of isolated sleeve gastrectomy (ISG on these parameters was examined. Methods. 236 patients underwent ISG with intraoperative liver biopsy from December 2002 to September 2009. Besides demographic data, pre-operative weight/BMI, HbA1c, AST, ALT, triglycerides, HDL and LDL levels were determined. Results. A significant correlation of NASH with higher HbA1c, AST and ALT and lower levels for HDL was observed (P<.05, <.0001, <.0001, <.01, resp.. Overall BMI decreased from 45.0 ± 6.8 to 29.7 ± 6.5 and 31.6 ± 4.4 kg/m2 at 1 and 3 years. An impaired weight loss was demonstrated for patients with NASH and patients with elevated HbA1c (plateau 28.08 kg/m2 versus 29.79 kg/m2 and 32.30 kg/m2 versus 28.79 kg/m2, resp.. Regarding NASH, a significant improvement of AST, ALT, triglyceride and HDL levels was shown (P<.0001 for all. A resolution of elevated HbA1c was observed in 21 of 23 patients. Summary. NASH patients showed a significant loss of body weight and amelioration of NASH status. ISG can be successfully performed in these patients and should be recommended for this subgroup.

  18. Vertical Sleeve Gastrectomy Improves Glucose and Lipid Metabolism and Delays Diabetes Onset in UCD-T2DM Rats

    OpenAIRE

    Cummings, Bethany P.; Bettaieb, Ahmed; Graham, James L; Stanhope, Kimber L.; Kowala, Mark; Haj, Fawaz G.; Chouinard, Michael L.; Peter J Havel

    2012-01-01

    Vertical sleeve gastrectomy (VSG) has gained interest as a low morbidity bariatric surgery, which is effective in producing weight loss and causing type 2 diabetes resolution. However, the efficacy of VSG to prevent the onset of type 2 diabetes has not been previously investigated. VSG or sham surgery was performed on 2-month-old prediabetic male University of California Davis-type 2 diabetes mellitus rats. Sham-operated animals were either sham-operated ad libitum fed (S-AL) or were weight-m...

  19. Optical Coherence Tomography Parameters in Morbidly Obese Patients Who Underwent Laparoscopic Sleeve Gastrectomy

    Directory of Open Access Journals (Sweden)

    Berna Dogan

    2016-01-01

    Full Text Available Purpose. To investigate changes in optical coherence tomography parameters in morbidly obese patients who had undergone laparoscopic sleeve gastrectomy (LSG. Methods. A total of 41 eyes of 41 morbidly obese patients (BMI ≥ 40 who had undergone LSG were included in study. The topographic optic disc parameters, central macular thickness (CMT, total macular volume (TMV, and retinal ganglion cell layer (RGCL were measured by spectral-domain optical coherence tomography (SD-OCT. Subfoveal choroidal thickness (SFCT was measured by enhanced deep imaging-optical coherence tomography (EDI-OCT. Results. The mean CMT was 237.4±24.5 μm, 239.3±24.1 μm, and 240.4±24.5 μm preoperatively, 3 months postoperatively, and 6 months postoperatively, respectively (p<0.01. The mean TMV was 9.88±0.52 mm3, 9.96±0.56 mm3, and 9.99±0.56 mm3 preoperatively, 3 months postoperatively, and 6 months postoperatively, respectively (p<0.01. The mean RGCL was 81.2±6.5 μm, 82.7±6.6 μm, and 82.9±6.5 μm preoperatively, 3 months postoperatively, and 6 months postoperatively, respectively (p<0.01. The mean SFCT was 309.8±71.8 μm, 331.0±81.4 μm, and 352.7±81.4 μm preoperatively, 3 months postoperatively, and 6 months postoperatively, respectively (p<0.01. No statistically significant differences were found between the preoperative values and 3- and 6-month postoperative values in rim area (p=0.34, disc area (p=0.64, vertical cup/disc ratio (p=0.39, cup volume (p=0.08, or retinal nerve fiber layer (p=0.90. Conclusions. Morbidly obese patients who undergo LSG experience a statistically significant increase in CMT, TMV, SFCT, and RGCL at 3 months and 6 months after surgery.

  20. Ileal interposition with sleeve gastrectomy for treatment of type 2 diabetes mellitus

    Directory of Open Access Journals (Sweden)

    Sunil Kumar Kota

    2012-01-01

    Full Text Available Aim: Combination of laparoscopic ileal interposition (II with sleeve gastrectomy (SG is an upcoming procedure, which offers good metabolic improvement and weight reduction without causing significant malabsorption. The objective of this study was to evaluate the results of this novel procedure for control of type 2 diabetes, obesity, hypertension, and related metabolic abnormalities. Materials and Methods: The II and SG was performed in 43 patients (M:F = 25:18 from February 2008. Participants had a mean age of 47.2 ± 8.2 years (range 29-66 years, mean duration of diabetes of 10.1 ± 9.2 years (range 1-32 years, and mean preoperative body mass index (BMI of 33.2 ± 7.8 kg/m2. All patients had poorly controlled type 2 diabetes mellitus (DM [mean glycated hemoglobin (HbA1C 9.6 ± 2.1%] despite use of oral hypoglycemic agents (OHAs and/or insulin. Thirty (70% patients had hypertension, 20 (46% had dyslipidemia, and 18 (42% had significant microalbuminuria. The primary outcome was remission of diabetes (HbA1C < 6.5% without OHAs/insulin and the secondary outcomes were reduction in antidiabetic agent requirement and components of metabolic syndrome. Results: Mean follow-up was for 20.2 ± 8.6 months (range 4-40 months. Postoperatively, glycemic parameters (fasting and post-lunch blood sugar, HbA1C improved in all patients (P < 0.05 at all intervals. Twenty (47% patients had remission in diabetes and the remaining patients showed significantly decreased OHA requirement. All patients had weight loss between 15 and 30% (P < 0.05. Twenty-seven (90% patients had remission in hypertension. At 3 years, the mean fall in HbA1C (34% was more than reduction in BMI (25%. There was a declining trend in lipids and microalbuminuria postoperatively, though it was significant for microalbuminuria only. Conclusions: The laparoscopic II with SG seems to be a promising procedure for control of type 2 DM, hypertension, weight reduction, and associated metabolic

  1. Gastrectomía vertical laparoscópica transumbilical Transumbilical sleeve gastrectomy. Experience in six patients

    Directory of Open Access Journals (Sweden)

    FERNANDO MALUENDA G

    2010-12-01

    Full Text Available Introducción: La cirugía laparoscópica ha estado orientada los últimos años a buscar otras alternativas mínimamente invasivas de acceso abdominal. La transumbilical es una vía que ha comenzado a ser aplicada clínicamente, con o sin dispositivos de acceso único. Hemos comenzado a realizar la gastrectomía vertical laparoscópica (GVL por vía transumbilical, en ciertos casos seleccionados. Objetivo: Evaluar la factibilidad de realizar la GVL por vía transumbilical, utilizando un dispositivo de acceso único y el resto del instrumental laparoscópico tradicional. Método: Protocolo prospectivo aplicado a pacientes que cumplan con criterios de inclusión como: ser candidato a GVL, tener IMC igual o menor a 36 kg/m², distancia entre apéndice xifoides y ombligo menor a 22 cm. El peso promedio de las pacientes operadas fue de 90,5 kg, (82,5-98, IMC promedio de 33,8 kg/m² (32,5-35,3. Se describe la técnica de inserción del dispositivo, de la gastrectomía y del manejo postoperatorio. Resultados: Se logró realizar GVL en las 6 pacientes en las que se intentó. El tiempo operatorio promedio fue de 127 min (90 a 170 min, en las dos primeras pacientes se requirió el uso de un trocar adicional de 5 mm. En todas las pacientes, la radiografía baritada de esófago, estómago y duodeno mostró buen paso a distal y ausencia de estenosis, fondo residual o filtraciones. No hubo morbilidad en este grupo. Conclusiones: La GVL es factible de realizar en pacientes portadores de obesidad menor a 36 kg/ m²de superficie corporal, usando un dispositivo de acceso único e instrumental laparoscópico tradicional.Background: The transumbilical route can be used to perform sleeve gastrectomies. Aim: To report the experience with transumbilical sleeve gastrectomy. Material and Methods: A prospective protocol of transumbilical sleeve gastrectomy was applied among patients with a body mass index of 36 kg/m² or less, and a distance between the xiphoid process

  2. Imatinib mesylate pharmacokinetics before and after sleeve gastrectomy in a morbidly obese patient with chronic myeloid leukemia.

    Science.gov (United States)

    Pavlovsky, Carolina; Egorin, Merrill J; Shah, Dhvani D; Beumer, Jan H; Rogel, Silvia; Pavlovsky, Santiago

    2009-09-01

    Abstract Imatinib is widely used to treat chronic myeloid leukemia and gastrointestinal stromal tumors. The agent, administered orally, has approximately 98% oral bioavailability, achieves maximum plasma concentration approximately 2-4 hours after ingestion, and has a plasma half-life of approximately 18 hours. As maintaining an adequate plasma imatinib concentration is essential to achieving a favorable therapeutic response, it is important to determine whether gastrointestinal surgery, pathologic conditions, or anatomic changes negatively affect imatinib absorption, and thereby result in subtherapeutic plasma imatinib concentrations. We describe a 36-year-old, morbidly obese woman with chronic myeloid leukemia who received treatment with alpha-interferon and cytarabine over 5 years. Her chemotherapy was then switched to imatinib 400 mg/day because she failed to achieve a molecular response with the other two agents. A complete molecular response was achieved with imatinib. Four years later, she underwent a sleeve gastrectomy while receiving imatinib. Imatinib plasma pharmacokinetic values were assessed before and on four occasions during the year after the sleeve gastrectomy. The patient's trough plasma concentration before surgery (1558 ng/ml) was consistent with those found in the literature (>/= 1000 ng/ml), whereas her trough concentrations after surgery were 46-60% lower (629-836 ng/ml) than the preoperative value. Despite this, the patient remained in complete molecular remission for 1 year after surgery. Monitoring plasma imatinib concentrations is recommended in morbidly obese patients with chronic myeloid leukemia or gastrointestinal stromal tumors who undergo gastric procedures. Additional pharmacokinetic studies, however, are needed in these patients. PMID:19698017

  3. The different effects of gastric banding and sleeve gastrectomy on obese rat%胃束带术和袖状胃切除术对营养性肥胖大鼠干预效果差异的研究

    Institute of Scientific and Technical Information of China (English)

    梁永康; 王兵

    2012-01-01

    Objective To evaluate the different effects of gastric banding (GB) and sleeve gastrectomy (SG) on diet-induced obese rat model.Methods The obese rat model was established via the diet-induced method,and then underwent SG,GB,or sham-operation (SO) procedures.The different effects of SG,GB,and SO on these rats were evaluated at the 14th,28th and 56th day after operation.Results After 7 weeks' feeding,31rats in high-diet group reached the modeling standard.The model success rate was 88.6% (31/35).GB and SG group showed significantly less cumulative food intake than SO group ( P < 0.01).There was no significant difference between GB and SG group in cumulative food intake ( P > 0.05 ).The average weight of rats in GB and SG group was (609.1±6.0) g and (591.6 ±4.3) g respectively at the 56th day after operation while it was (649.8 ± 10.0) g for SO group.The difference had statistical significance ( P < 0.01).SG group showed better improvement effects on TC,TG,FFA,LDL-c and HDL-c than GB group (P <0.05).The postoperative ghrelin level in GB and SG group all decreased constantly and it decreased slower in GB group than in SG group.At the 56th day after operation,the ghrelin level in GB and SG group reduced from (1151.0 ± 144.2) pg/ml and (1148.2±127.2) pg,/ml to (992.0+121.9) pg/ml (P<0.05) and (761.0+125.3) pg/ml (P<0.01) respectively.The leptin level in GB and SG group all showed decreasing tendency.However,the leptin level of the 2 groups presented significant difference at the 56th day after operation.Conclusions There is no significant difference between GB and SG group in postoperative cumulative food intake.However,SG has better effects on controlling weight gain and improving blood lipids than GB.The different effects of GB and SG on the level of ghrelin and leptin in rats may account for the different curative effects.%目的 探讨胃束带术(GB)和袖状胃切除术(SG)对营养性肥胖大鼠疗效的差异.方法 对饮食诱导方法建

  4. A Case Study of Severe Esophageal Dysmotility following Laparoscopic Sleeve Gastrectomy.

    Science.gov (United States)

    Sheppard, Caroline E; Sadowski, Daniel C; Gill, Richdeep; Birch, Daniel W

    2016-01-01

    Following bariatric surgery, a proportion of patients have been observed to experience reflux, dysphagia, and/or odynophagia. The etiology of this constellation of symptoms has not been systematically studied to date. This case describes a 36-year-old female with severe esophageal dysmotility following LSG. Many treatments had been used over a course of 3 years, and while calcium channel blockers reversed the esophageal dysmotility seen on manometry, significant symptoms of dysphagia persisted. Subsequently, the patient underwent a gastric bypass, which seemed to partially relieve her symptoms. Her dysphagia was no longer considered to be associated with a structural cause but attributed to a "sleeve dysmotility syndrome." Considering the difficulties with managing sleeve dysmotility syndrome, it is reasonable to consider the need for preoperative testing. The question is whether motility studies should be required for all patients planning to undergo a LSG to rule out preexisting esophageal dysmotility and whether conversion to gastric bypass is the preferred method for managing esophageal dysmotility after LSG. PMID:27413570

  5. Evaluation of laparoscopic sleeve gastrectomy compared with laparoscopic Roux-en-Y gastric bypass for people with morbid obesity: A systematic review and meta-analysis

    Science.gov (United States)

    Arabi Basharic, Fateme; Olyaee Manesh, Alireza; Ranjbar Ezzat Abadi, Mohammad; Shiryazdi, Seyed Mostafa; Shabahang, Hussein; Jangjoo, Ali

    2016-01-01

    Background: Prevalence of obesity in the world, in both developed and developing countries, is growing rapidly. Bariatric surgery is now accepted as the treatment for morbid obesity. Objective: This study compares laparoscopic sleeve gastrectomy's effectiveness (LSG) with the most common bariatric surgery, laparoscopic Roux-en-Y (LRYGB) gastric bypass. Methods: A systematic review was performed using relevant search data bases, including Cochrane library, PubMed, Magi ran, Iranmedex, SID and Trip database, with no time limit. Data bases were searched until July 2014 for randomized control trials. The studied population included people aged between 18–60 years, with BMI≥35 and at least one obesity-related disease, or people with BMI≥40. BMI change, as the research outcome, was investigated at least in one-year follow-up period. Cochrane criteria were used to assess quality of studies. The results were extracted from the articles. Results: In total, 384 articles were obtained in the search; six RCTs were included in this study. There was no significant difference between the two laparoscopic sleeve gastrectomy and laparoscopic Roux-en-Y gastric bypass procedures in BMI, and both groups were similar in weight loss CI [-.1.31, 0.43], p=0.32. Conclusion: The two procedures of bariatric surgery are effective and reliable treatments. Performing more trial studies with greater sample size and longer follow-up period for making final decision in selecting a certain surgical procedure is essential.

  6. Laparoscopic Sleeve Gastrectomy for Mildly Obese Patients (Body Mass Index of 30 <35 kg/m2: Operative Outcome and Short-Term Results

    Directory of Open Access Journals (Sweden)

    Roger Noun

    2012-01-01

    Full Text Available Background. Data concerning laparoscopic sleeve gastrectomy (LSG in mild obesity are under investigation. Aim/Objective. May 2010 to May 2012, 122 consecutive patients with preoperative body mass index (BMI of 33±2.5 kg/m2 (range 30–34.9 undergoing LSG were studied. Mean age was 33±10 years (range 15–60, and 105 (86% were women. Mean preoperative weight was 91±9.7 kg (range 66–121, and preoperative excess weight was 30±6.7 kg (range 19–43. Comorbidities were detected in 44 (36% patients. Results. Mean operative time was 58±15 min (range 40–95, and postoperative stay was 1.8±0.19 days (range 1.5–3. There were no admissions to intensive care unit and no deaths within 30 days of surgery. The rates of leaks and strictures were 0%, and of hemorrhage 1.6%. At 12 months, BMI decreased to 24.7±2, and the percentage of excess weight loss (% EWL reached 76.5%. None of the patients had a BMI below 20 kg/m2. Comorbidities resolved in 70.5% or improved in 29.5%. Patient satisfaction scoring (1–5 at least 1 year after was 4.6±0.8 for body image and 4.4±0.6 for food tolerance. Conclusion. LSG for mildly obese patients has proved to be technically relatively easy, safe, and benefic in the short term.

  7. Laparoscopic sleeve gastrectomy for morbid obesity with intra-operative endoscopic guidance. Immediate peri-operative and 1-year results after 25 patients.

    Science.gov (United States)

    Diamantis, T; Alexandrou, A; Pikoulis, E; Diamantis, D; Griniatsos, J; Felekouras, E; Papalambros, E

    2010-08-01

    Laparoscopic sleeve gastrectomy (LSG) represents a promising alternative option for the surgical treatment of morbid obesity. Its standard technique includes the longitudinal division of the stomach along a bougie of varying diameter. We report in this retrospective study our experience with LSG being performed with the use of intra-operative endoscopy instead of the bougie. Twenty-five consecutive patients (18 women, seven men) with a mean age of 40.2 years and mean body weight of 152.1 kg were submitted to LSG with intra-operative endoscopy in our hospital. The mean preoperative BMI was 53.5 kg/m(2). There were no conversions. Mean operative time was 117.5 min. There was no morbidity or mortality. The mean loss of excess body weight (EBW) at 3 months post-op was 19 +/- 1.8 kg, at 6 months was 28.6 +/- 4.5 kg, and at 1 year post-op was 48.9 +/- 3.7 kg (min 11-max 92). In other words the patients had lost 30 +/- 5%, 45 +/- 7.7%, and 60.8 +/- 4.3% of their EBW, respectively. The mean excess body weight loss at the day of the last visit to our outpatient clinic was 52.3 +/- 4.3 kg which corresponded to 66.4 +/- 4.3% of the total excess weight. LSG with intra-operative endoscopic guidance is a safe and efficient alternative method to treat morbid obesity and is a viable option for surgical units familiar with endoscopic techniques. PMID:20464526

  8. Exploration of standardized procedures of laparoscopic sleeve gastrectomy%腹腔镜胃袖状切除术的标准化操作流程探索

    Institute of Scientific and Technical Information of China (English)

    梁辉; 管蔚; 曹庆; 刘欢

    2015-01-01

    胃液漏、梗阻患者.第一阶段组、第二阶段组和第三阶段组患者手术时间分别为(91±31) min、(56±27) min、(54±18) min,术中出血量分别为(51±33) mL、(24±20) mL、(21±20)mL,术后住院时间分别为(4.1±3.4)d、(3.1±2.7)d、(3.0±2.1)d,术后1年EWL分别为67%±12%、65%±14%、68%±24%,3组患者在手术时间和术中出血量方面比较,差异均有统计学意义(F=7.471,6.037,P<0.05).3组患者术后住院时间、术后1年EWL方面比较,差异均无统计学意义(F=1.439,2.296,P>0.05).153例患者均获得术后随访.19例合并呼吸睡眠暂停综合征患者,术后3个月完全缓解.21例合并多囊卵巢综合征患者,术后均缓解.27例合并2型糖尿病患者,术后1年完全缓解25例,明显改善2例.79例合并脂代谢异常患者,术后1年脂代谢正常57例.112例脂肪肝患者,术后均有所改善.结论 腹腔镜胃袖状切除术安全、有效.手术操作可以标准化,切割线的全层缝合可能避免胃液漏的发生,术后可不放置胃管和腹腔引流管.%Objective To explore the standardized procedures of laparoscopic sleeve gastrectomy (LSG).Methods The clinical data of 153 patients with obesity who underwent LSG at the First Affiliated Hospital of Nanjing Medical University from December 2010 to December 2014 were retrospectively analyzed.All the 153 patients were divided into 3 groups:22 patients in the first stage group were admitted to the hospital from December 2010 to September 2011,57 patients in the second stage group were admitted to the hospital from October 2011 to December 2013 and 74 patients in the third stage group were admitted to the hospital from January 2014 to December 2014.In the first stage group,1.1 cm gastroscope in diameter was introduced into the pylorus as a support,great curve of stomach with 5 cm distances from the pylorus was cut using a green cartridge,and then blue cartridges were used at the body and fundus of stomach.The 3-0 vicryl continuous and

  9. Effects of Laparoscopic Sleeve Gastrectomy on Reproductive Endocrine Functions in Patients with Polycystic Ovary Syndrome%腹腔镜胃袖状切除对多囊卵巢综合征生殖内分泌功能改善的作用

    Institute of Scientific and Technical Information of China (English)

    王恺京; 忻颖; 周小钢; 徐冰; 支云清; 朱江帆

    2014-01-01

    Objective To explore the feasibility and clinical efficacy of laparoscopic sleeve gastrectomy for the improvement of reproductive endocrine functions in patients with polycystic ovary syndrome. Methods From February 2012 to February 2014, a total of 11 patients with polycystic ovarian syndrome underwent laparoscopic sleeve gastrectomy.The therapeutic effects of the operation like weight loss, menstrual cycle, and reproductive endocrine functions were followed up and observed. Results The laparoscopic sleeve gastrectomy was performed successfully in all the 11 patients.During postoperative follow-up, 10 (10/11) patients obtained normal menstruation in 3 months, and 6 (6/6) patients recovered from oligomenorrhea symptoms.At 3 months after surgery, 4 patients with hyperandrogenism preoperatively recovered to the normal levels.Four ( 4/7 ) patients with hirsute-syndrome were improved obviously after 3-6 months, with the Ferriman-Gallwey scores lower than 5.The BMI was decreased by 4.1-7.6 (5.3 ±1.5) during follow-up for 3 -24 months. Conclusion Laparoscopic sleeve gastrectomy can effectively improve clinical symptoms of obese patients with polycystic ovary syndrome, with fast recovery of menstrual cycle in a short time and significantly relieved hyperandrogenism.%目的:探讨腹腔镜胃袖状切除术改善多囊卵巢综合征( polycystic ovary syndrome,PCOS)生殖内分泌失调的可行性及临床疗效。方法2012年2月~2014年2月,对11例伴有肥胖的PCOS患者行腹腔镜胃袖状切除术,观察月经周期、生殖内分泌及体重等的变化。结果11例均成功完成腹腔镜胃袖状切除术,10例(10/11)术后3个月内月经恢复正常周期,其中6例(6/6)术前稀发排卵的患者均恢复正常排卵,4例术前高雄激素血症患者术后3个月雄激素水平均恢复到正常范围,4例(4/7)多毛患者术后3~6个月Ferriman-Gallwey多毛评分降至5分以下。术后随访3~24

  10. Gastric lipoma excision during a laproscopic sleeve gastrecomy: A case report

    OpenAIRE

    Al Shammari, Jaber O.; Nimer Al-Shadidi; Ahmad J. Abdulsalam; Abdullah E. Al-Daihani

    2016-01-01

    Introduction: Gastric lipomas are rare benign mesenchymal tumors of the stomach. Case report: We report a 41 year old, morbid obese male, admitted for elective laparoscopic sleeve gastrectomy. Thorough preoperative assessment revealed a gastric lipoma in the antrum of the stomach measuring 3 × 3 cm. Due to the patient’s preference, surgical resection of the lipoma was done along with the laparoscopic sleeve gastrectomy procedure. Discussion: In our case, we report a rare case of submuco...

  11. Effect of sleeve gastrectomy plus side-to-side jejunoileal anastomosis on the expression of GLP-1 in ZDF rats%胃袖状切除附加空回肠吻合术对ZDF大鼠GLP-1蛋白表达的影响

    Institute of Scientific and Technical Information of China (English)

    周小钢; 王恺京; 徐安安; 高玮; 陆佳军; 朱江帆

    2015-01-01

    目的:探讨胃袖状切除加空回肠侧侧吻合术(sleeve gastrectomy plus side-to-side jejunoileal anastomosis,JI-SG)对糖尿病肥胖(Zucker diabetic fatty,ZDF)大鼠末端回肠黏膜组织胰高血糖素样肽-1(glucagon-like peptide 1,GLP-1)蛋白表达及空腹血糖的影响,探讨其降糖的可能机制.方法:将30只ZDF大鼠随机分为假手术(sham surgery,SS)组、胃袖状切除(sleeve gastrectomy,SG)组、JI-SG组,术后同等条件下饲养12用,观察血清血糖、GLP-1及胰岛素水平,于术后12周末检测GLP-1蛋白在回肠末端组织中的表达.结果:JI-SG组、SG组回肠末端GLP-1蛋白表达阳性率高于SS组(P<0.05),伴有L细胞增生;JI-SG组较SG组有显著性升高(P<0.05).SG组、JI-SG组血糖水平较SS组明显下降(P<0.05),同时JI-SG组较SG组降糖效果更加明显(P<0.05).SG组、JI-SG组血清胰岛素水平较SS组明显下降(P<0.05),同时JI-SG组低于SG组(P<0.05).SG组、JI-SG组血清GLP-1水平较SS组明显升高(P<0.05),同时JI-SG组高于SG组(P<0.05).结论:JI-SG可显著增强回肠末端GLP-1蛋白表达,同时伴有L细胞增生,可能是其具有显著且持续稳定降糖作用的原因.

  12. Weighing the Options: Gastric Sleeve Surgery

    Medline Plus

    Full Text Available ... have is weight and all the health-related risks associated with weight. Yes. I can tell you ... the differences in weight loss time and surgical risk between the gastric sleeve and the gastric band? ...

  13. Gastric lipoma excision during a laproscopic sleeve gastrecomy: A case report

    OpenAIRE

    Al Shammari, Jaber O.; Al-Shadidi, Nimer; Ahmad J. Abdulsalam; Abdullah E. Al-Daihani

    2016-01-01

    Introduction Gastric lipomas are rare benign mesenchymal tumors of the stomach. Case report We report a 41 year old, morbid obese male, admitted for elective laparoscopic sleeve gastrectomy. Thorough preoperative assessment revealed a gastric lipoma in the antrum of the stomach measuring 3 × 3 cm. Due to the patient’s preference, surgical resection of the lipoma was done along with the laparoscopic sleeve gastrectomy procedure. Discussion In our case, we report a rare case of submucosal gastr...

  14. Effects of alveolar recruitment maneuver on perioperative pulmonary function in morbidly obese patients undergoing laparoscopic sleeve gastrectomy%肺复张对病态肥胖患者腹腔镜袖状胃切除术围术期肺功能的影响

    Institute of Scientific and Technical Information of China (English)

    魏珂; 曹俊; 彭丽桦; 黎平; 闵苏

    2016-01-01

    Objective To evaluate the effect of alveolar recruitment maneuver on the perioperative pulmonary function in the morbidly obese patients undergoing laparoscopic sleeve gastrectomy.Methods Forty morbidly obese patients of both sexes,of American Society of Anesthesiologists physical status Ⅰ or Ⅱ,aged 18-64 yr,with body mass index ≥ 40 kg/m2,scheduled for elective laparoscopic sleeve gastrectomy,were randomly divided into either control group (group C) or alveolar recruitment maneuver group (group R) using a random number table,with 20 patients in each group.Patients in group C were treated with volume-or pressure-controlled ventilation after creation of pneumoperitoneum,maintaining the peak inspiratory pressure (Ppeak) ≤ 30 cmH2O and partial pressure of end-tidal CO2 35-40 mmHg.Patients in group R received alveolar recruitment maneuver once every 30 min starting from creation of pneumoperitoneum until the end of surgery.Patients were transfered to post-anesthesia care unit (PACU) with endotracheal tube which was extubated when the unified extubation standard was achieved in PACU.The patients who stayed in PACU for 2 h showing no indications for extubation were transfered to intensive care unit for continuous ventilation support.Immediately after intubation,immediately after creation of pneumoperitoneum,at 30,60 and 90 min of pneumoperitoneum,and at the end of pneumoperitoneum,blood samples were collected from the radial artery for blood gas analysis.Immediately after intubation,immediately after creation of pneumoperitoneum,at 30,60 and 90 min of pneumoperitoneum,at the end of surgery,and immediately before discharge from PACU,Ppeak,plateau pressure (Peat),and dynamic lung compliance were recorded.The time for achieving extubation standard and time for achieving the standard for discharge from PACU were recorded.Patients were followed up until discharge,and the feeding time and duration of hospital stay were recorded.Results Compared with group C,PaO2 and

  15. Establishment and analysis of the rat model of sleeve gastrectomy plus side-to-side jejunoileal anastomosis in ZDF rats%ZDF大鼠胃袖状切除附加空回肠侧侧吻合术动物模型的建立

    Institute of Scientific and Technical Information of China (English)

    王恺京; 徐安安; 朱江帆; 周小钢; 高玮; 陆佳军; 刘晓慧; 陈志国; 殷晓琦

    2015-01-01

    目的:为2型糖尿病治疗机制方面的研究提供稳定、持久的降糖手术模型,用肥胖糖尿病(Zucker diabetic fatty,ZDF)大鼠建立胃袖状切除加空回肠侧侧吻合术(sleeve gastrectomy plus side-to-side jejunoileal anastomosis,JI-SG)动物模型.方法:将30只7周龄雄性ZDF大鼠随机分为3组,每组10只,分别为JI-SG组、假手术(sham operation,SO)组(SO组)、饮食控制组(对照组).观察并测量各组大鼠术前1d及术后1、3、6周体质量、空腹血糖.结果:手术大鼠存活率为90%(27/30),JI-SG组1只大鼠于术后第1天死亡,2只大鼠于术后3周后死亡.3组大鼠术前体质量、空腹血糖差异无统计学意义.对照组经饮食控制1周后体重上升缓慢,恢复正常饮食后体重迅速上升.JI-SG组及SO组术后大鼠体质量均进行性下降.SO组术后第7天体质量降至最低体重,此后明显上升;JI-SG组术后体重持续下降,术后6周,JI-SG大鼠体重明显小于其他两组,差异有统计学意义(P<0.05).术后对照组血糖稳步上升,SO组血糖下降后迅速上升,JI-SG组大鼠血糖逐渐下降至正常水平,术后6周3组间血糖差异有统计学意义(P<0.05).结论:本研究成功建立了ZDF大鼠JI-SG手术模型,此术式明显降低了ZDF大鼠体重、改善了ZDF血糖代谢,为2型糖尿病治疗机制的研究提供了一种稳定、持久的降糖手术模型.

  16. Aspectos técnicos da interposição ileal com gastrectomia vertical como possível opção ao tratamento do diabetes mellitus tipo 2 Technical aspects of ileal interposition with sleeve gastrectomy as a possible option for the treatment of type 2

    Directory of Open Access Journals (Sweden)

    Aureo Ludovico de Paula

    2010-06-01

    mortalidade, factível cirurgicamente pela via laparoscópica e passível de ser ofertada como opção operatória ao tratamento da diabetes mellitus tipo 2.INTRODUCTION: There is an evidence that the best results in terms of resolution of diabetes in morbidly obese patients are achieved with bilio-pancreatic bypass, especially the duodenal switch. These operations are characterized by partial gastrectomy and the rapid transit of food into the distal ileum through derivation of a significant segment of small intestine. The idea of performing the technique presented here was based on these principles. METHOD: The procedures are usually performed laparoscopically, after establishment of a pneumoperitoneum at 12-15 mmHg and introduction of six trocars. The patient is initially positioned in 30° reverse Trendelenburg with the surgeon on the right side of the patient. The sleeve gastrectomy is performed using the anatomical distal trifurcation of the anterior vagus nerve as a reference. The devascularization of the greater curvature is performed and extends to the oesophagogastric junction. With an intra-gastric calibration tube of 20 mm positioned along the lesser curvature, gastric resection starts at the proximal antrum with linear stapler up to oesophagogastric angle. An invaginating running suture is also performed. To perform the ileal interposition in the proximal jejunum, it is divided 20-30 cm distally with a 45-mm linear stapler. The cecum is identified and the distal ileum transected 30cm proximal to the ileocecal valve. A 170 to 200 cm of ileum was measured proximally along the anti-mesenteric border using a 10-cm marked atraumatic grasper, and transected with a 45-mm linear stapler. This segment of ileum is interposed in an isoperistaltic way into the proximal jejunum, previously divided. Next are perform three side-to-side enteroanastomosis. The first enteroanastomosis is the ileo-ileostomy, then the jejuno-ileostomy and finally, the ileo-jejunostomy. All three

  17. Reduced port laparoscopic gastrectomy: a review, techniques, and perspective.

    Science.gov (United States)

    Inaki, Noriyuki

    2015-02-01

    Reduced port laparoscopic surgery has been used increasingly. It is a concept that has grown out of the various efforts aimed at minimally invasive surgery, with SILS being the ultimate reduced port technique. Reduced port laparoscopic surgery has been used to perform sleeve gastrectomy in bariatric surgery and excision of benign gastric submucosal tumor, applications that generally do not require lymph node dissection or complicated reconstruction. It can be done safely, result in a permanent cure, and offer good cosmetic outcomes. Reduced port laparoscopic surgery for gastric cancer has a short history, and its usefulness has not yet been fully established. This review describes the present situation and challenges faced as well as standardized procedures and the future prospects of reduced port laparoscopic gastrectomy for gastric cancer, which my team performs almost daily. These aspects of reduced port laparoscopic surgery are presented in light of the literature. PMID:25496345

  18. Sleeve puller salvages welded tubes

    Science.gov (United States)

    Weaver, J. F.

    1980-01-01

    Tool removes sleeve remnants without distorting or damaging tubes, unlike pliers and other conventional handtools. Tubes can be reused, saving time, labor, and material in many applications. Sleeve-removal fixture consists of pressure screw, swing arm, locking screws, and base. It removes sleeve remnant from tubing after welded joint has been sawed through.

  19. Radiological findings after gastrectomy

    Energy Technology Data Exchange (ETDEWEB)

    Riedl, P.; Polterauer, P.; Funovics, J.

    1980-06-01

    In 63 patients after total gastrectomy and reconstruction of the small bowel described by Beal-Longmire, Roux and Tomoda radiological findings were correlated with clinical symptoms. No correlation could be found between clinical symptoms of dumping and oesophagitis caused by reflux on one side and increased length of intestinal transit time, increased diameter of intestinal loops and gastro-oesophageal reflux on the other side. Enlarged blind loops after termino-lateral oesophago-jejunostomy and insufficient ligations (operation technique by Tomoda) were correlated with higher incidence of pains. Patients operated by the method of Beal-Longmire and Roux showed better results than those operated with the method of Tomoda.

  20. Bursectomy at radical gastrectomy

    Institute of Scientific and Technical Information of China (English)

    Cuneyt; Kayaalp

    2015-01-01

    Radical gastrectomy with extended lymph node dissec tion and prophylactic resection of the omentum, peri toneum over the posterior lesser sac, pancreas and/o spleen was advocated at the beginning of the 1960 s in Japan. In time, prophylactic routine resections of the pancreas and/or spleen were abandoned because of the high incidence of postoperative complications. However omentectomy and bursectomy continued to be standard parts of traditional radical gastrectomy. The bursaomentalis was thought to be a natural barrier against invasion of cancer cells into the posterior part of the stomach. The theoretical rationale for bursectomy was to reduce the risk of peritoneal recurrences by eliminating the peritoneum over the lesser sac, which might include free cancer cells or micrometastases. Over time, the indication for bursectomy was gradually reduced to only patients with posterior gastric wall tumors penetrating the serosa. Despite its theoretical advantages, its benefit for recurrence or survival has not been proven yet. The possible reasons for this inconsistency are discussed in this review. In conclusion, the value of bursectomy in the treatment of gastric cancer is still under debate and large-scale randomized studies are necessary. Until clear evidence of patient benefit is obtained, its routine use cannot be recommended.

  1. Late Band Migration After SAGB. Case Report

    Directory of Open Access Journals (Sweden)

    Meissner Wiktor

    2015-07-01

    Full Text Available Obesity, a major public health issue of the 21st century, is increasingly common in adults and children. No good results of pharmacological treatment of obesity results in rapid development of bariatric surgery, which treats obesity and comorbidities associated. There are many surgical options for treating obesity. Options for surgical management of morbid obesity include restrictive (adjustable gastric banding, vertical band gastroplasty, restrictive/resective (sleeve gastrectomy, restrictive/malabsorptive (Rouxen-Y gastric by-pass, biliopancreatic diversion with duodenal switch and purely malabsorptive procedures (duodenal switch. Among them, swedish adjustable gastric banding (SAGB or laparoscopic adjustable gastric banding (LAGB have been more frequently performed. SAGB is considered to be safe and effective method of weight loss and elimination of diseases associated with obesity. Laparoscopic gastric banding offers the advantages of minimally invasive surgery, adjustability, and reversibility. Despite fewer number of complications than other bariatric operations, patients after SAGB may have unique complications that are characteristic of the SAGB and require special management and treatment. This paper presents a rare case of complete migration of the band into the gastric lumen.

  2. 胃袖状切除联合空回肠侧侧吻合术对2型糖尿病大鼠减重与改善代谢的影响%Effects of sleeve gastrectomy plus side-to-side jejunoileal anastomosis on weight loss and metabolic control of the rats with type 2 diabetes mellitus

    Institute of Scientific and Technical Information of China (English)

    王恺京; 徐安安; 周小钢; 陆佳军; 高玮; 陈志国; 刘晓慧; 朱江帆

    2015-01-01

    Objective To investigate the effects of sleeve gastrectomy (SG) plus side-to-side jejunoileal anastomosis on weight loss and metabolic control in a rat model of type 2 diabetes mellitus.Methods Thirty male Zucker diabetic fatty (ZDF) rats aged 7 weeks were divided into the JI-SG group,the SG group and the control group based on the random number table.Ten rats in the JI-SG group received SG plus side-to-side jejunoileal anastomosis,10 rats in the SG group receive SG and 10 rats in the control group received sham surgery.Body weight and fasting blood glucose were detected at preoperative day 1 and at preoperative week 1,2,4,6,8,10,12.Fasting plasma insulin,ghrelin and glucagon-like peptide 1 (GLP-1) were detected at preoperative day 1 and postoperative week 6 and 12.The measurement data with normal distribution were presented as x ± s.The comparison between groups was analyzed using the LSD-t test and comparisons among many groups were done using ANOVA.The repeated measurement data were analyzed by the repeated measures ANOVA.Results The body weight of rats in the JI-SG,SG and control group were changed from (297.2 ± 2.1) g,(302.0 ± 1.8) g and (296.0 ± 2.1) g before operation to (242.7 ± 13.2) g,(380.4 ± 16.5) g and (440.1 ± 15.1) g at postoperative week 12,there was an upward trend between the control group and the SG group and a steady trend in the JI-SG group,with a significant difference among the 3 groups (F =42.5,P < 0.05).The levels of blood glucose in JI-SG,SG and control group before operation were (11.7 ± 1.7) mmol/L,(11.4 ± 3.1) mmol/L and (12.4 ± 1.5) mmol/L,with no significant difference among the 3 groups (F =18.2,P > 0.05).The levels of blood glucose in JI-SG group,the SG group and the control group were changed from (5.7 ± 0.7) mmol/L,(6.2 ± 1.6) mmol/L and (7.4 ±0.5) mmol/L at postoperative week 1 to (6.9 ± 2.5) mmol/L,(13.9 ± 2.8) mmol/L and (22.2 ± 2.9) mmol/L at postoperative week 12,showing a slow upward trend between the JI

  3. Storage envelopes or sleeves

    International Nuclear Information System (INIS)

    A storage envelope or sleeve particularly for processed X-ray films is described. It consists of front and back panels joined together at a hinge line and connected along the intermediate sides by connecting flaps. An inner pocket is formed from a third flap which is folded to lie against the inner face of the back panel. The panels may have additional score lines parallel to the closed sides of the envelope and the inner pocket so that the envelope and the inner pocket can accommodate bulky contents. The free edge of the pocket is inset from the open side of the envelope, and finger cut-outs may be provided to facilitate access to the contents of the envelope and the pocket. (author)

  4. Peripancreatic Lymphocele after Distal Gastrectomy

    International Nuclear Information System (INIS)

    Lymphocele occurs as a result of persistent leakage of disrupted lymphatics. Peripancreatic lymphocele is quite rare and has not yet been described in the literature. Here we report on a case of peripancreatic lymphocele in which a cystic mass was observed with a fat attenuating component using computed tomography after gastrectomy.

  5. Peripancreatic Lymphocele after Distal Gastrectomy

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Eun Joo; Kim, Mi Jeong [Dept. of Diagnostic Radiology, Keimyung University School of Medicine, Daegu (Korea, Republic of)

    2012-02-15

    Lymphocele occurs as a result of persistent leakage of disrupted lymphatics. Peripancreatic lymphocele is quite rare and has not yet been described in the literature. Here we report on a case of peripancreatic lymphocele in which a cystic mass was observed with a fat attenuating component using computed tomography after gastrectomy.

  6. Intraoperative fracture of phacoemulsification sleeve

    OpenAIRE

    Wong David; Chan Keith SK; Shum Jennifer WH; Li Kenneth KW

    2010-01-01

    Abstract Background We describe a case of intraoperative fracture of phacoemulsification sleeve during phacoemulsification surgery. Case presentation Phacoemulsification surgery was performed in the left eye of a 58-year-old lady with grade II nuclear sclerosis & grade I cortical cataract. Towards the end of quadrant removal, there was anterior chamber instability with impaired followability of nuclear fragments. The distal part of the fractured sleeve remained inside the anterior chamber upo...

  7. Sleeving nanocelluloses by admicellar polymerization.

    Science.gov (United States)

    Trovatti, Eliane; Ferreira, Adriane de Medeiros; Carvalho, Antonio José Felix; Ribeiro, Sidney José Lima; Gandini, Alessandro

    2013-10-15

    This investigation reports the first application of admicellar polymerization to cellulose nanofibers in the form of bacterial cellulose, microfibrillated cellulose, and cellulose nanowhiskers using styrene and ethyl acrylate. The success of this physical sleeving was assessed by SEM, FTIR, and contact angle measurements, providing an original and simple approach to the modification of cellulose nanofibers in their pristine aqueous environment. PMID:23921337

  8. Single port Billroth I gastrectomy

    Directory of Open Access Journals (Sweden)

    Jeremy R Huddy

    2013-01-01

    Full Text Available Introduction: Experience has allowed increasingly complex procedures to be undertaken by single port surgery. We describe a technique for single port Billroth I gastrectomy with a hand-sewn intracorporeal anastomosis in the resection of a benign tumour diagnosed incidentally on a background of cholelithiasis. Materials and Methods: Single port Billroth I gastrectomy and cholecystectomy was performed using a transumbilical quadport. Flexible tipped camera and straight conventional instruments were used throughout the procedure. The stomach was mobilised including a limited lymph node dissection and resection margins in the proximal antrum and duodenum were divided with a flexible tipped laparoscopic stapler. The lesser curve was reconstructed and an intracorporal hand sewn two layer end-to-end anastomosis was performed using unidirectional barbed sutures. Intraoperative endoscopy confirmed the anastomosis to be patent without leak. Results: Enteral feed was started on the day of surgery, increasing to a full diet by day 6. Analgesic requirements were a patient-controlled analgesia morphine pump for 4 postoperative days and paracetamol for 6 days. There were no postoperative complications and the patient was discharged on the eighth day. Histology confirmed gastric submucosal lipoma. Discussion: As technology improves more complex procedures are possible by single port laparoscopic surgery. In this case, flexible tipped cameras and unidirectional barbed sutures have facilitated an intracorporal hand-sewn two layer end-to-end anastomosis. Experience will allow such techniques to become mainstream.

  9. Sleeving repair of heat exchanger tubes

    International Nuclear Information System (INIS)

    Defective heat exchanger tubes can be repaired using techniques that do not involve the cost and schedule penalties of component replacement. FTI's years of experience repairing steam generator tubes have been successfully applied to heat exchangers. Framatome Technologies heat exchanger sleeves can bridge defective areas of the heat exchanger tubes, sleeves have been designed to repair typical heat exchanger tube defects caused by excessive tube vibration, stress corrosion cracking, pitting or erosion. By installing a sleeve, the majority of the tube's heat transfer and flow capacity is maintained and the need to replace the heat exchanger can be delayed or eliminated. Both performance and reliability are improved. FTI typically installs heat exchanger tube sleeves using either a roll expansion or hydraulic expansion process. While roll expansion of a sleeve can be accomplished very quickly, hydraulic expansion allows sleeves to be installed deep within a tube where a roll expander cannot reach. Benefits of FTI's heat exchanger tube sleeving techniques include: - Sleeves can be positioned any where along the tube length, and for precise positioning of the sleeve eddy current techniques can be employed. - Varying sleeve lengths can be used. - Both the roll and hydraulic expansion processes are rapid and both produce joints that do not require stress relief. - Because of low leak rates and speed of installations, sleeves can be used to preventatively repair likely-to-fail tubes. - Sleeves can be used for tube stiffening and to limit leakage through tube defects. - Because of installation speed, there is minimal impact on outage schedules and budgets. FTI's recently installed heat exchanger sleeving at the Kori-3 Nuclear Power Station in conjunction with Korea Plant Service and Engineering Co., Ltd. The sleeves were installed in the 3A and 3B component cooling water heat exchangers. A total of 859 tubesheet and 68 freespan sleeves were installed in the 3A heat

  10. Totally Laparoscopic Gastrectomy for Gastric Cancer

    OpenAIRE

    Theodorous, Arianne N.; Train, William W.; Goldfarb, Michael A.; Borao, Frank J.

    2013-01-01

    Background and Objectives: Recent studies have supported minimally invasive techniques as a viable alternative to open surgery in the treatment of gastric cancer. The goal of this study is to review our institution's experience with totally laparoscopic gastrectomy for the treatment of both early- and advanced-stage gastric cancer. Methods: A retrospective study was conducted to examine the short-term outcomes of laparoscopic gastrectomy performed at Monmouth Medical Center between May 2003 a...

  11. Liver transplantation and sleeve gastrectomy in the medically complicated obese: New challenges on the horizon

    Institute of Scientific and Technical Information of China (English)

    Diego; C; Reino; Keri; E; Weigle; Erik; P; Dutson; Adam; S; Bodzin; Keri; E; Lunsford; Ronald; W; Busuttil

    2015-01-01

    In the last 30 years, operative, technical and medical advances have made liver transplantation(LT) a lifesaving therapy that is used worldwide today. Global industrialization has been a contributor to morbid obesity and this has brought about the metabolic syndrome along with many downstream complications of such. Non-alcoholic steatohepatitis(NASH) has become a recognized hepatic manifestation of the metabolic syndrome and NASH cirrhosis is predicted to be the primary indication for LT in the United States by 2025. Several case series and database reviews have begun analyzing the efficacy of weight reduction surgery in the LT recipient. These data have reasonably demonstrated that weight reduction surgery in the LT recipient is a feasible endeavor. However, several questions have been raised regarding the type of weight reduction surgery, timing of surgery in relation to LT, patient and allograft survival and post-LT maintenance of weight loss to name a few. We look forward to a time when weight reduction surgery will work to improve the technical conduct of LT, improve perioperative benchmarks such as blood transfusions, intensive care unit length of stay and help to prevent recurrence of NASH cirrhosis in the medically complicated obese patient. In the meantime, well-designed prospective clinical trials that focus on the issues highlighted will help guide us in the care of these complicated patients who will soon account for the majority of the patients in our clinics.

  12. The impact resistance of CAGR graphite sleeves

    International Nuclear Information System (INIS)

    A simple model of horizontal mode impact testing of CAGR fuel element outer graphite sleeves is proposed which is in close agreement with measured values of critical impact velocity and impact duration. The importance of mechanical property changes during irradiation on impact resistance of the sleeves is discussed. (author)

  13. Wakes of idealized propeller shafts with sleeves

    Energy Technology Data Exchange (ETDEWEB)

    Hally, D. [Defence R and D Canada - Atlantic, Dartmouth, Nova Scotia (Canada)]. E-mail: david.hally@drdc-rddc.gc.ca

    2005-07-01

    The rotation of a bare propeller shaft on a twin screw ship can have a significant effect on the flow into the propeller plane, with consequent effects on the propeller efficiency and cavitation characteristics. TRANSOM, the DRDC Atlantic flow solver, was used to determine whether covering the shaft with a nonrotating sleeve along part of its length would improve the propeller inflow. Two sets of calculations were performed. In the first a semi-infinite cylindrical shaft protruded from a flat plate. The shaft was covered along part of its length by a zero thickness stationary sleeve. To gain an understanding of the effects of the diameter of the sleeve relative to the shaft, a second set of calculations was performed in which the diameter of the sleeve was larger than that of the shaft. To avoid complications in gridding this configuration, the flat plate was removed; the shaft was infinite in both directions with a change in radius and a change from non-rotating to rotating in the middle. These calculations suggest that a sleeve will reduce the wake fraction in the propeller disk by delaying the formation of a vortex that entrains velocity deficit from the hull boundary layer. The sleeve also keeps the entrained velocity deficit closer to the shaft where it is less likely to induce cavitation. As the mismatch in radii of the sleeve and shaft increases, the entrained velocity deficit increases, so thinner sleeves should be preferred. (author)

  14. Root cause analysis of thermal sleeve separation

    International Nuclear Information System (INIS)

    Thermal sleeves in the shape of thin wall cylinder seated inside the nozzle part of each Safety Injection (SI) line at Pressurized Water Reactors (PWRs) have such functions as prevention and relief of potential excessive transient thermal stress in the wall of SI line nozzle part which is initially heated up with hot water flowing in the primary coolant piping system when cold water is injected into the system through the SI nozzles during the SI operation mode. Recently, mechanical failures that the sleeves were separated from the SI branch pipe and fell into the connected cold leg main pipe occurred in sequence at some typical PWR plants in Korea. To find out the root cause of thermal sleeve breakaway failures, the flow situation in the junction of primary coolant main pipe and SI branch pipe, and the vibration modal characteristics of the thermal sleeve are investigated in detail by using both Computational Fluid Dynamic (CFD) code and structure analysis finite element code. As the results, the transient response in fluid force exerting on the local part of thermal sleeve wall surface to the primary coolant flow through the pipe junction area during the normal reactor operation mode shows oscillatory characteristics with frequencies ranging from 17 to 18, which coincide with one of the lower mode natural frequencies of thermal sleeve having a pinned support condition on the circumferential prominence on the outer surface of thermal sleeve which is put into the circumferential groove on the inner surface of SI nozzle at the mid-height of the thermal sleeve. In addition, the variation of force on the thermal sleeve surface yields alternating torques in the directions of two rectangular axes which are perpendicular to the longitudinal axis of cylindrical thermal sleeve, which cause rolling, pitching and rotating motions of the thermal sleeve. Consequently, it is seen that this flow situation surrounding the thermal sleeve during the normal reactor operation can

  15. Root cause analysis of thermal sleeve separation

    Energy Technology Data Exchange (ETDEWEB)

    Jo, J. C.; Jhung, M. J.; Yu, S. O.; Kim, H. J.; Yune, Y. K.; Park, J. Y

    2006-01-15

    Thermal sleeves in the shape of thin wall cylinder seated inside the nozzle part of each Safety Injection (SI) line at Pressurized Water Reactors (PWRs) have such functions as prevention and relief of potential excessive transient thermal stress in the wall of SI line nozzle part which is initially heated up with hot water flowing in the primary coolant piping system when cold water is injected into the system through the SI nozzles during the SI operation mode. Recently, mechanical failures that the sleeves were separated from the SI branch pipe and fell into the connected cold leg main pipe occurred in sequence at some typical PWR plants in Korea. To find out the root cause of thermal sleeve breakaway failures, the flow situation in the junction of primary coolant main pipe and SI branch pipe, and the vibration modal characteristics of the thermal sleeve are investigated in detail by using both Computational Fluid Dynamic (CFD) code and structure analysis finite element code. As the results, the transient response in fluid force exerting on the local part of thermal sleeve wall surface to the primary coolant flow through the pipe junction area during the normal reactor operation mode shows oscillatory characteristics with frequencies ranging from 17 to 18, which coincide with one of the lower mode natural frequencies of thermal sleeve having a pinned support condition on the circumferential prominence on the outer surface of thermal sleeve which is put into the circumferential groove on the inner surface of SI nozzle at the mid-height of the thermal sleeve. In addition, the variation of force on the thermal sleeve surface yields alternating torques in the directions of two rectangular axes which are perpendicular to the longitudinal axis of cylindrical thermal sleeve, which cause rolling, pitching and rotating motions of the thermal sleeve. Consequently, it is seen that this flow situation surrounding the thermal sleeve during the normal reactor operation can

  16. 舰载宽带单极套筒天线的FDTD建模及设计方法研究%FDTD Modeling and Design of Shipboard Broad Band Monopole Sleeve Antenna

    Institute of Scientific and Technical Information of China (English)

    李戈阳; 高火涛; 王剑波

    2011-01-01

    为了实现舰载天线的可视化分析与设计,采用时域有限差分法(FDTD)建立了细同轴天线的电磁模型,并基于此模型设计了100~400MHz舰载单极套筒天线。通过仿真计算研究了天线几何参数对天线电性能的影响,仿真结果表明该天线具有宽频带特性,但驻波比在高频段不够理想,因此进一步对天线顶端进行了阻抗加载。研究表明,在天线增益不高的前提下该加载方法有效地将驻波比控制在2.5以下。文中所采用的天线建模、设计、仿真以及电抗加载方法,对舰载天线的优化设计与电磁兼容分析均有一定的参考意义。%To carry out visual analysis and design of shipboard antenna, the mathematic and physical model of thin sleeve monopole antenna was established based on Finite Difference Time Domain (FDTD) method. By this model, a shipboard monopole sleeve antenna working at 100 MHz-400 MHz was designed. The effects of geometrical parameters on the electrical property of antenna were analyzed numerically. The simulation results showed that the antenna was kind of broadband, but the Voltage Standing Wave Ratio(VSWR) was not good enough in high frequency range, and impedance loading technique for the top antenna was introduced. The simulation results demonstrate that the broadband is constrained below 2.5 without gain reduction of antenna. The modeling, design, simulation and impedance loading technique employed in the paper are beneficial to the optimum design and EMC analysis of shipboard antennas.

  17. Steam generator tube laser sleeving

    International Nuclear Information System (INIS)

    For many years, Framatome has been used with different techniques and means to perform the steam generator tube sleeving operation, such as the 'mechanical' either GTAW welded or kinetic welding process. As soon as first power laser units appeared on the market we felt right interested in applying this process to the sleeving operation. After comparison between all the processes and equipments existing at that time (that is to say CO2 and YAG laser units), we chose the YAG and bought a 1.2 kW NEC laser unit in 1988. As it was installed in our Welding Center of Le Creusot, this equipment enabled us carrying out a preliminary test programme which targets were: getting the mastery of the equipment and associated technologies, implementing this process for the sleeve welding operation by improvement of the welding-pen. The NEC laser unit became afterwards transferred to our workshop in Chalon-sur-Saone (June 1990), where we achieved the final tests of the process at the same time we were investigating the development of industrial operation means. The actual program is mainly focused on 7/8'' tube steam generator repair process at tubesheet outlet. Yet made sure that our methods and means apply as well to 3/4'' tubes up to second tube support-plate level. Sleeves are made of heat-treated Inconel 690. The sleeved unit has been designed to provide the same breaking strength and leak-tightness as the tube. The upper part of sleeve consists of an anti-pop out length which ensures some locking-up in case the tube breaks in upper transition expansion area. Preliminary tests dealt with the various parameters which may exert an influence on geometry and quality of the, weld bead, as: - laser beam power (for continuous and pulsed modes), - welding speed, - focal spot size and location from the surface to be welded, - protective gas. After performance of preliminary tests on many thousands of weld beads we decided to use the process according to following criteria: Weld quality

  18. Vibrio cholerae bacteremia associated with gastrectomy.

    OpenAIRE

    Toeg, A; Berger, S A; Battat, A; Hoffman, M.; Yust, I

    1990-01-01

    Bacteremia due to Vibrio cholerae is rare. Each of 15 cases previously reported in the English language literature occurred in the setting of immune deficiency. We describe an instance of non-serogroup O1 V. cholerae septicemia in an otherwise healthy patient. Susceptibility to such infection may have been enhanced by a prior gastrectomy for duodenal ulcer.

  19. Vagus effect on pylorus-preserving gastrectomy

    Institute of Scientific and Technical Information of China (English)

    1999-01-01

    @@ INTRODUCTION Maki and others reported in 1967 the study of a pylorus-preserving gastrectomy (PPG)[1]. It successfully prevented dumping syndrome and duodenogastric reflux, but failed in gaining proper speed of gastric emptying, thus leading to new complications such as gastric retention, etc. To inquire into this subject, we have made the following experimental studies.

  20. Weighing the Options: Gastric Sleeve Surgery

    Medline Plus

    Full Text Available Weighing the Options: Gastric Sleeve Surgery Halifax Health Florida December 7, 2011 I chose to have bariatric surgery because I have struggled with yo-yo dieting for probably 25 years, and ...

  1. Bowing test of HTGR graphite sleeve

    International Nuclear Information System (INIS)

    Bowing characteristics were examined for IG-11 and H451 graphite sleeve specimens to which temperature gradients were given in the circumferential direction using a specially prepared rig. Measurements were also carried out on load or bending moment which was caused in the sleeve specimens under constraint as a result of temperature gradients. Experimental data were well analyzed on the basis of the elastic theory on the deflection of beams. Bending tests of the sleeve specimens indicated that the bending moment generated in the sleeve specimens under constraint was less than one-third of that at fracture even when the maximum temperature difference along the circumferential direction was more than 2000C. (author)

  2. Weighing the Options: Gastric Sleeve Surgery

    Medline Plus

    Full Text Available ... that using this gastric sleeve, and the stapling gun that we are going to demonstrate here in ... stapler, right here. Alright, and that’s the staple gun you’ve got around the stomach right now. ...

  3. Weighing the Options: Gastric Sleeve Surgery

    Medline Plus

    Full Text Available ... the this gastric sleeve that’s done laparoscopically as well. Well, I got to tell you. I just heard ... 50 states, ranked number 33. So, we are well established in the lower 50 th percentile, and ...

  4. Sleeve Muscle Actuator: Concept and Prototype Demonstration

    Institute of Scientific and Technical Information of China (English)

    Tad Driver; Xiangrong Shen

    2013-01-01

    This paper presents the concept and prototype demonstration results of a new sleeve muscle actuator,which provides a significantly improved performance through a fundamental structural change to the traditional pneumatic muscle.Specifically,the sleeve muscle incorporates a cylindrical insert to the center of the pneumatic muscle,and thus eliminates the central portion of the intemal volume.Through the analysis of the actuation mechanism,it is shown that the sleeve muscle is able to provide a consistent increase of force capacity over the entire range of motion.Furthermore,the sleeve muscle provides a significant energy saving effect,as a result of the reduced internal volume as well as the enhance force capacity.To demonstrate this new concept,a sleeve muscle prototype was designed and fabricated.Experiments conducted on the prototype verified the improvement in the force capacity and demonstrated a significant energy saving effect (20%-37%).Finally,as the future work on this new concept,the paper presents a new robotic elbow design actuated with the proposed sleeve muscle.This unique design is expected to provide a highly compact and powerful actuation approach for robotic systems.

  5. Myocardial Sleeve Tissues in Surgical Lung Specimens.

    Science.gov (United States)

    Yoshida, Akihiko; Kamata, Tsugumasa; Iwasa, Takeshi; Watanabe, Shun-ichi; Tsuta, Koji

    2015-10-01

    Left atrial myocardial extensions over the pulmonary veins (PVs), known as myocardial sleeves, are present in the physiological anatomy of most individuals. Although this structure has recently received clinical attention as a major origin of paroxysmal atrial fibrillation (AF), it has not been documented in surgical specimens. Here, we examine incidentally identified myocardial sleeve tissue in routinely processed lung resection specimens to determine its incidence and diagnostic implications. Among 694 lung resection specimens with evaluable PV margins, myocardial sleeve tissue was identified in 26 cases (3.7%). The tissue was located within the adventitia of the PVs, mostly in margin preparations, and existed outside the pericardium in the majority of cases. Carcinoma infiltration of the sleeves was evident in 6 cases. No heart injuries were observed, and no tumors invaded the heart. Preoperative electrocardiography showed sinus rhythm in all cases, whereas postoperative monitoring revealed sinus rhythm in all patients except one who showed AF and flutter. Myocardial sleeve tissue is an underrecognized incidental finding in lung resection specimens, and it is not indicative of heart injury. Cancer infiltration into this tissue indicates neither heart invasion nor, by itself, invasion into the pericardium. Although surgical transection of the myocardial sleeve did not evoke immediate arrhythmia in most cases, the overall influence of this procedure on the postsurgical risk of AF remains to be determined in further studies involving extensive rhythm assessment. PMID:26099012

  6. Microscopic Examination of Stools After Partial Gastrectomy

    Science.gov (United States)

    Lowry, R. B.; Tamboline, B. L.; Bogoch, A.

    1965-01-01

    The present study was undertaken to determine the frequency with which undigested meat fibres in the stool could be found after partial gastrectomy. A sample of stool was examined in 61 patients who had undergone a partial gastrectomy and in 92 control patients. The age ranges and average ages of both groups were similar. The stools of 77 of the 92 control patients contained well-digested meat fibres, 14 showed partially digested fibres, and one patient had completely undigested meat fibres. In the postgastrectomy group, 44 of 61 patients had well-digested meat fibres and 17 showed partially digested fibres in their stools. None showed undigested fibres. The present study demonstrated that the finding of undigested meat fibres is as infrequent in postgastrectomy patients as in control patients. If undigested meat fibres are found in the stools of postgastrectomy patients, it is suggestive of pancreatic exocrine insufficiency. ImagesFig. 2 PMID:5842594

  7. Pylorus-Preserving Gastrectomy for Gastric Cancer.

    Science.gov (United States)

    Oh, Seung-Young; Lee, Hyuk-Joon; Yang, Han-Kwang

    2016-06-01

    Pylorus-preserving gastrectomy (PPG) is a function-preserving surgery for the treatment of early gastric cancer (EGC), aiming to decrease the complication rate and improve postoperative quality of life. According to the Japanese gastric cancer treatment guidelines, PPG can be performed for cT1N0M0 gastric cancer located in the middle-third of the stomach, at least 4.0 cm away from the pylorus. Although the length of the antral cuff gradually increased, from 1.5 cm during the initial use of the procedure to 3.0 cm currently, its optimal length still remains unclear. Standard procedures for the preservation of pyloric function, infra-pyloric vessels, and hepatic branch of the vagus nerve, make PPG technically more difficult and raise concerns about incomplete lymph node dissection. The short- and long-term oncological and survival outcomes of PPG were comparable to those for distal gastrectomy, but with several advantages such as a lower incidence of dumping syndrome, bile reflux, and gallstone formation, and improved nutritional status. Gastric stasis, a typical complication of PPG, can be effectively treated by balloon dilatation and stent insertion. Robot-assisted pylorus-preserving gastrectomy is feasible for EGC in the middle-third of the stomach in terms of the short-term clinical outcome. However, any benefits over laparoscopy-assisted PPG (LAPPG) from the patient's perspective have not yet been proven. An ongoing Korean multicenter randomized controlled trial (KLASS-04), which compares LAPPG and laparoscopy-assisted distal gastrectomy for EGC in the middle-third of the stomach, may provide more clear evidence about the advantages and oncologic safety of PPG. PMID:27433390

  8. Pylorus-Preserving Gastrectomy for Gastric Cancer

    Science.gov (United States)

    Oh, Seung-Young; Yang, Han-Kwang

    2016-01-01

    Pylorus-preserving gastrectomy (PPG) is a function-preserving surgery for the treatment of early gastric cancer (EGC), aiming to decrease the complication rate and improve postoperative quality of life. According to the Japanese gastric cancer treatment guidelines, PPG can be performed for cT1N0M0 gastric cancer located in the middle-third of the stomach, at least 4.0 cm away from the pylorus. Although the length of the antral cuff gradually increased, from 1.5 cm during the initial use of the procedure to 3.0 cm currently, its optimal length still remains unclear. Standard procedures for the preservation of pyloric function, infra-pyloric vessels, and hepatic branch of the vagus nerve, make PPG technically more difficult and raise concerns about incomplete lymph node dissection. The short- and long-term oncological and survival outcomes of PPG were comparable to those for distal gastrectomy, but with several advantages such as a lower incidence of dumping syndrome, bile reflux, and gallstone formation, and improved nutritional status. Gastric stasis, a typical complication of PPG, can be effectively treated by balloon dilatation and stent insertion. Robot-assisted pylorus-preserving gastrectomy is feasible for EGC in the middle-third of the stomach in terms of the short-term clinical outcome. However, any benefits over laparoscopy-assisted PPG (LAPPG) from the patient's perspective have not yet been proven. An ongoing Korean multicenter randomized controlled trial (KLASS-04), which compares LAPPG and laparoscopy-assisted distal gastrectomy for EGC in the middle-third of the stomach, may provide more clear evidence about the advantages and oncologic safety of PPG. PMID:27433390

  9. Pressurizer with a mechanically attached surge nozzle thermal sleeve

    Science.gov (United States)

    Wepfer, Robert M

    2014-03-25

    A thermal sleeve is mechanically attached to the bore of a surge nozzle of a pressurizer for the primary circuit of a pressurized water reactor steam generating system. The thermal sleeve is attached with a series of keys and slots which maintain the thermal sleeve centered in the nozzle while permitting thermal growth and restricting flow between the sleeve and the interior wall of the nozzle.

  10. Weighing the Options: Gastric Sleeve Surgery

    Medline Plus

    Full Text Available ... problems have pretty much disappeared. No Type II diabetes. My sugar level is completely normal. I have ... sleeve surgery? Yes. Yes. In a majority of cases, patients lose their appetite. They have to ... There’s a report several years ago of Jenny Craig or Nutrisystem ...

  11. [Survival after gastrectomy for cancer. 209 cases].

    Science.gov (United States)

    Le Treut, Y P; Capobianco, C; Botti, G; Christophe, M; Lebreuil, G; Bricot, R

    1992-09-26

    The long-term results of 209 gastrectomies performed for adenocarcinoma, including 117 which were prospectively collected, are presented. Resection was curative in 154 cases (73.6 percent). The TNM distribution of the tumours was: stage I (TxNOMO) 75 cases, stage II (TxN1MO) 46 cases, stage III (TxN2MO) 33 cases and stage IV (TxNxM1) 55 cases. Lymph node involvement was more frequent in the prospective than in the retrospective study. With a more than 5 years' follow-up of 80 percent of the patients operated upon, the actuarial survival rate at 5 years (operative mortality included) was 38 percent for all lesions, 52 percent for curative resection and 2 percent for palliative resection. Following curative resection, the survival rates for tumours of the upper, middle and lower thirds of the stomach were 40, 60 and 55 percent respectively. These rates were 60 percent for stage I tumours, 54 percent for stage II tumours and 25 percent for stage III tumours. The results obtained in this series, where most of the curative gastrectomies included excision of N1 and N2 lymph nodes, show that lymph node involvement has no significant importance for the prognosis when it is proximal (N1) and is not incompatible with prolonged survival when it is pedicular (N2). PMID:1465364

  12. Function-preserving gastrectomy for gastric cancer in Japan.

    Science.gov (United States)

    Nomura, Eiji; Okajima, Kunio

    2016-07-14

    Surgery used to be the only therapy for gastric cancer, and since its ability to cure gastric cancer was the focus of attention, less attention was paid to function-preserving surgery in gastric cancer, though it was studied for gastroduodenal ulcer. Maki et al developed pylorus-preserving gastrectomy for gastric ulcer in 1967. At the same time, the definition of early gastric cancer (EGC) was being considered, histopathological investigations of EGC were carried out, and the validity of modified surgery was sustained. After the development of H2-blockers, the number of operations for gastroduodenal ulcers decreased, and the number of EGC patients increased simultaneously. As a result, the indications for pylorus-preserving gastrectomy for EGC in the middle third of the stomach extended, and various alterations were added. Since then, many kinds of function-preserving gastrectomies have been performed and studied in other fields of gastric cancer, and proximal gastrectomy, jejunal pouch interposition, segmental gastrectomy, and local resection have been performed. On the other hand, from the overall perspective, it can be said that endoscopic resection, which was launched at almost the same time, is the ultimate function-preserving surgery under the current circumstances. The current function-preserving gastrectomies that are often performed and studied are pylorus-preserving gastrectomy and proximal gastrectomy. The reasons for this are that these procedures that can be performed with systemic lymph node dissection, and they include three important elements: (1) reduction of the extent of gastrectomy; (2) preservation of the pylorus; and (3) preservation of the vagal nerve. In addition, these operations are more likely to be performed with a laparoscopic approach as minimally invasive surgery. Of the above-mentioned three elements, reduction of the extent of gastrectomy is the most important in our view. Therefore, we should try to reduce the extent of gastrectomy

  13. Performance of Grouted Splice Sleeve Connector under Tensile Load

    Directory of Open Access Journals (Sweden)

    A. Alias

    2016-05-01

    Full Text Available The grouted splice sleeve connector system takes advantage of the bond-slip resistance of the grout and the mechanical gripping of reinforcement bars to provide resistance to tensile force. In this system, grout acts as a load-transferring medium and bonding material between the bars and sleeve. This study adopted the end-to-end rebars connection method to investigate the effect of development length and sleeve diameter on the bonding performance of the sleeve connector. The end-to-end method refers to the condition where reinforcement bars are inserted into the sleeve from both ends and meet at the centre before grout is filled. Eight specimens of grouted splice sleeve connector were tested under tensile load to determine their performance. The sleeve connector was designed using 5 mm thick circular hollow section (CHS steel pipe and consisted of one external and two internal sleeves. The tensile test results show that connectors with a smaller external and internal sleeve diameter appear to provide better bonding performance. Three types of failure were observed in this research, which are bar fracture (outside the sleeve, bar pullout, and internal sleeve pullout. With reference to these failure types, the development length of 200 mm is the optimum value due to its bar fracture type, which indicates that the tensile capacity of the connector is higher than the reinforcement bar. It is found that the performance of the grouted splice sleeve connector is influenced by the development length of the reinforcement bar and the diameter of the sleeve.

  14. Bilateral Tibial Tubercle Sleeve Fractures in a Skeletally Immature Patient

    Directory of Open Access Journals (Sweden)

    Rasesh R. Desai

    2013-01-01

    Full Text Available Tibial tubercle sleeve fracture is a rare injury. In concept, it is similar to the patellar sleeve fracture in a skeletally immature patient. We describe a unique case of simultaneous bilateral tibial tubercle sleeve fractures in a 12-year-old boy. Radiographs and MRI confirmed the injury. The patient underwent open surgical repair of bilateral sleeve fractures with suture anchor fixation. At the final followup, 3 years after his initial injury, the patient demonstrated full knee function bilaterally without radiographic evidence of growth disturbances.

  15. Effect of bispectral index monitoring on desflurane consumption and recovery time in morbidly obese patients undergoing laparoscopic sleeve gastrectomy

    OpenAIRE

    Ibrahim, Tamer H.; Yousef, Gamal T.; Hasan, Ali M. Ali; Eldesuky, Hossam I.

    2013-01-01

    Background: Morbid obesity magnifies the importance of the fat–blood solubility coefficient of the anesthetic in its relation to emergence and recovery. Using bispectral index (BIS) monitoring for the titration of the administration of inhaled anesthetics such as desflurane may permit a less consumption and more rapid recovery from desflurane anesthesia in morbidly obese patients, which enables earlier maintenance of a patent airway, better protection against aspiration, and better oxygenatio...

  16. EVALUATION OF N-RATIO IN SELECTING PATIENTS FOR ADJUVANT CHEMORADIOTHERAPY AFTER D2-GASTRECTOMY

    OpenAIRE

    Wilson Luiz da COSTA JUNIOR; Felipe Jose Fernandez COIMBRA; Batista, Thales Paulo; RIBEIRO, Heber Salvador de Castro; DINIZ, Alessandro Landskron

    2013-01-01

    Context Whether adjuvant chemoradiotherapy may contribute to improve survival outcomes after D2-gastrectomy remains controvertial. Objective To explore the clinical utility of N-Ratio in selecting gastric cancer patients for adjuvant chemoradiotherapy after D2-gastrectomy. Methods A retrospective cohort study was carried out on gastric cancer patients who underwent D2-gastrectomy alone or D2-gastrectomy plus adjuvant chemoradiotherapy (INT-0116 protocol) at the Hospital A. C. Camargo from...

  17. The Pancreozymin-Secretin Test After Partial Gastrectomy

    Science.gov (United States)

    McGillivray, D. C.; Stordy, S. N.; Bogoch, A.

    1966-01-01

    The administration of pancreozymin and secretin to eight control patients and 18 patients after partial gastrectomy caused no rise in serum amylase levels above normal. Four postgastrectomy patients had unexplained elevations of basal serum lipase levels but in only one did the lipase increase above the basal level after stimulation. Duodenal aspirates from the control group and from one patient with a Billroth I gastrectomy showed a wide range of values for volume, bicarbonate and amylase content. This would appear to limit the diagnostic value of the test. The two-tube method used for collecting duodenal contents proved difficult. PMID:20328564

  18. Reconstruction with Jejunal Pouch after Gastrectomy for Gastric Cancer.

    Science.gov (United States)

    Namikawa, Tsutomu; Munekage, Eri; Munekage, Masaya; Maeda, Hiromichi; Kitagawa, Hiroyuki; Nagata, Yusuke; Kobayashi, Michiya; Hanazaki, Kazuhiro

    2016-06-01

    The construction of a gastric substitute pouch after gastrectomy for gastric cancer has been proposed to help ameliorate postprandial symptoms and nutritional performance. Adequate reconstruction after gastrectomy is an important issue, because postoperative patient quality of life (QOL) primarily depends on the reconstruction method. To this end, jejunal pouch (JP) reconstructions were developed to improve the patient's eating capacity and QOL by creating large reservoirs with improved reflux barriers to prevent esophagitis and residual gastritis. It is important that such reconstructions also preserve blood and extrinsic neural integrity for maintaining pouch function, because JP motility is associated directly with QOL. Some problems remain to be resolved with the JP reconstructions method including gastrointestinal motility, which plays a major role in food transfer, digestion, and absorption of nutrients. Further studies including basic research and larger prospective randomized control trials are also needed to obtain definitive results. With persistent innovations in surgical techniques, JP after gastrectomy could become a safe and preferable reconstructive modality to improve patient QOL after gastrectomy. PMID:27305882

  19. Gastric emptying after proximal subtotal gastrectomy for cardiac cancer

    International Nuclear Information System (INIS)

    Objective: To assess emptying of the remaining stomach after proximal subtotal gastrectomy for cardiac cancer, and to explore a method improving the life quality of postoperative patients. Methods: Radio-nuclide gastric emptying test was performed on 17 patients who underwent proximal subtotal gastrectomy plus disruption of pyloric sphincter (PSG + DPS) by manipulative nipping and on 8 patients who underwent proximal subtotal gastrectomy (PSG) only 18 to 20 d before, and on 5 normal controls. Test meal was prepared from the mixture of soybean milk powder (40 g), water (200 mL) and 99Tcm-DTPA (18.5 MBq) as a tracer. Results: During the first 105 min after ingestion of test meal, gastric emptying rate at each time was lower in PSG group than those in PSG + DPS group (P 0.05). The time required for the stomach to empty half of its radioactive content (T1/2) was longer in the patients who had PSG only [(61.5 +- 7.0) min] than that in those who underwent PSG + DPS [(25.6 +- 5.6) min], (P = 0.0013) and normal controls [(33.6 +- 6.1) min], (P = 0.026). However, there was no significant difference regarding T1/2 between the patients with PSG + DPS and normal controls (P > 0.05). Conclusions: Proximal subtotal gastrectomy inevitably delays the emptying of remaining stomach, and DPS can effectively accelerate its emptying and improve postoperative symptoms

  20. Wear process mathematical modelling of sleeve assembly details of ice

    OpenAIRE

    С. А. Загайко

    2013-01-01

    Features of mathematical modeling of wear process of a cylinder sleeve, piston rings and a piston skirt of an internal combustion engine are considered. Model approbation on the basis of resource tests of an internal combustion engine is carried out.

  1. Assessment of the behaviour of irradiated graphite fuel sleeves

    International Nuclear Information System (INIS)

    Graphite sleeves from fuel elements irradiated in the CAGR's at Hinkley Pt B and Hunterston 'B' reactors have been examined by the CEGB at Winfrith and BNL and by AEA/BNFL at Windscale as part of the national CAGR post-irradiation examination programme. Many of the properties which are affected by fast neutron damage and/or coolant interactions are relevant to the sleeve's performance in reactor and are monitored routinely. The results from these measurements are reviewed and the overall conclusion is that the sleeves are behaving very much as predicted, providing confidence in the methodology applied to new designs of sleeves and for increasing the target irradiation of fuel to 24GWd/t. (author)

  2. Preliminary joining experiment of alumina pipes by using ceramics sleeve

    International Nuclear Information System (INIS)

    Preliminary experiments on alumina ceramics pipes joining by using shrinkable alumina sleeve and high melting point oxide solder have been carried out. Sleeves were prepared by way of sintering at relatively low temperature to shrink 1% during following joining process. As solder, alumina-calcia system was selected and paste containing alumina and calcium carbonate powder mixture was prepared. Joining was carried out by inserting the paste between sleeve and pipes, and by heating at 1500degC in air. By the shrink of sleeve and the formation of interface by solder, it was possible to realize the joined pipe without the vacuum leakage. The airtightness of the joined alumina pipes is almost equal to it of the metal pipe welding. (author)

  3. Clinical Management of Patients Presenting with Non-Adjustable Gastric Band (NAGB) Complications

    Science.gov (United States)

    Balogh, Julius; Vizhul, Andrey; Dunkin, Brian J.; Tariq, Nabil; Sherman, Vadim

    2014-01-01

    Background: A number of bariatric surgical procedures have been developed to manage morbid obesity and related co-morbidities. The non-adjustable gastric band (NAGB) was one such procedure that created restriction to food intake by gastric segmentation. Benefits of the procedure included a low risk of perioperative complications and substantial early weight loss. Unfortunately, the long term results of NAGB include a high incidence of complications and failure to maintain weight loss. The purpose of this study was to examine the presentation, workup, and treatment of patients presenting with complications following NAGB placement. Methods: A retrospective review of the diagnosis and management of 11 patients who presented with complications related to NAGB placement. Results: All patients presented with some degree of proximal gastric outlet obstruction. The majority of patients (8/11) presented with vomiting as the main complaint. Other complaints included intolerance to solids, liquids, and reflux. Only 2/11 patients presented with weight loss since undergoing NAGB placement, while the remainder had weight regain to their pre-NAGB level and above. Depending on clinical presentation, desire for additional weight loss and co-morbid conditions, patients underwent a variety of treatments. This included NAGB removal (endoscopic, laparo-endoscopic, and laparoscopic) as well as conversion to another bariatric procedure (sleeve gastrectomy, Roux-en-Y gastric bypass). Conclusion: Patients with NAGB complications present with symptoms related to a proximal gastric outlet obstruction, related to constriction imposed by the band. This may result in severe food and liquid intolerance and subsequent weight loss, but more likely results in maladaptive eating and subsequent weight gain. Optimal therapy involves removal of the NAGB. Laparoscopic conversion to another bariatric procedure, optimally a Roux-en-Y gastric bypass, is warranted to treat morbid obesity and associated co

  4. Weighing the Options: Gastric Sleeve Surgery

    Medline Plus

    Full Text Available ... of them, and it really depends on the companies. Some insurances will cover the gastric bypass and ... is the band, called the realized band, another product of J&J and Ethicon, correct? Same people ...

  5. Weighing the Options: Gastric Sleeve Surgery

    Medline Plus

    Full Text Available ... I know sometimes they encounter issues like gallstone development, is that correct? Harry, either one of you ... is the band, called the realized band, another product of J&J and Ethicon, correct? Same people ...

  6. Experimental study on Bond slip relationship of Steel sleeve

    Directory of Open Access Journals (Sweden)

    Wang J.C.

    2016-01-01

    Full Text Available The assembled concrete structure is usually connected with the steel bar through the sleeve. In order to realize the optimum design of sleeve structure and develop new sleeve, the author put forward a new test method, and made 18 specimens for uniaxial tensile test. Study the influence of the strength of grouting material, diameter of reinforcing steel bar on bond slip relationship between steel bar and grouting material and its failure characteristics by experimental research. This result suggests that with the increase of age, the bond strength between steel bar and grouting material is increasing gradually, the increase speed gradually slowed down after 20 days. For CT20H sleeve, with the increase of the diameter of reinforcement, the bond strength between reinforcement and grouting material increased gradually. Conclusion: In the optimization design of the sleeve, under the premise of ensuring the smooth injection of grouting material and be convenient for the positioning of the reinforced members, reducing the inner diameter of the sleeve can improve the bond strength between reinforcement and grouting material.

  7. Evaluation of Safety and Efficacy of the EndoLift Liver Retractor

    Science.gov (United States)

    2015-08-03

    Minimally Invasive Surgical Procedure; Laparoscopic Gastric Banding; Laparoscopic Roux-en-Y Gastric Bypass; Laparoscopic Sleeve Gastrectomy; Laparoscopic Fundoplication Procedure; Laparoscopic Heller Myotomy; Laparoscopic Paraesophageal Hernia Repair; Laparoscopic Gastric Resection

  8. Post-gastrectomy acute pancreatitis in a patient with gastric carcinoma and pancreas divisum

    OpenAIRE

    Kuo, I-Ming; WANG, FRANK; Liu, Keng-Hao; Jan, Yi-Yin

    2009-01-01

    Gastrectomy is commonly performed for both benign and malignant lesions. Although the incidence of post-gastrectomy acute pancreatitis (PGAP) is low compared to other well-recognized post-operative complications, it has been reported to be associated with a high mortality rate. In this article, we describe a 70-year-old man with asymptomatic pancreatic divisum who underwent palliative subtotal gastrectomy for an advanced gastric cancer with liver metastasis. His post-operative course was comp...

  9. Systematic review of feasibility and safety of laparoscopic gastrectomy for gastric cancer

    Institute of Scientific and Technical Information of China (English)

    Jiwen Jiang

    2012-01-01

    Objective: The purpose of the present study was to retrospectively and systematically evaluate the feasibility and safety of laparoscopic gastrectomy for gastric cancer.Methods: Research of prospective, randomized, controlled studies addressing laparoscopic gastrectomy versus open gastrectomy was screened through computer-based online system.Meta-analysis of acquired data was performed.The inverse variance method was used to test the significance of continuous data, while the Mantel-Haenszel method was used for dichotomous data.The chi-square test was used for evaluation of data heterogeneity.Homogenous data were calculated using the fixed effect model, and heterogeneous data were calculated using freedom model.Statistical data were expressed as 95% confidence interval (95% CI).Funnel plot was used for sensitivity analysis to show potential publication bias.Results: Five papers met the inclusion criteria, 164 cases underwent laparoscopic gastrectomy and 162 cases received open gastrectomy.Meta-analysis revealed that laparoscopic gastrectomy took longer operating time and removed fewer lymph nodes than open gastrectomy (both P < 0.01), but for early-stage gastric cancer, laparoscopic gastrectomy was superior to open gastrectomy in terms of blood loss and hospital stay (P < 0.01).But there were no significant differences in terms of time to resumption of oral intake, postoperative complications, postoperative morbidity rate, and tumor recurrence.Sensitive analysis demonstrated that publication bias existed in all indices to different extents with the exception of lymph node.Subgroup analysis showed that for D1 lymph node dissection, laparoscopic gastrectomy took significantly reduced blood loss than open gastrectomy.Conclusion: All these findings indicate that laparoscopic gastrectomy for early stage gastric cancer is feasible and safe.

  10. All carbon coaxial supercapacitors based on hollow carbon nanotube sleeve structure

    International Nuclear Information System (INIS)

    All carbon coaxial supercapacitors based on hollow carbon nanotube (CNT) sleeve structure are assembled and tested. The key advantage of the structure is that the inner core electrode is variable from CNT sleeve sponges, to CNT fibers, reduced graphene oxide fibers, and graphene woven fabrics. By changing core electrodes from sleeve sponges to CNT fibers, the electrochemical performance has been significantly enhanced. The capacitance based on sleeve sponge + CNT fiber double the capacitances of double-sleeve sponge supercapacitors thanks to reduction of the series and internal resistances. Besides, the coaxial sleeve structure possesses many other features, including high rate capacitance, long cycle life, and good flexibility. (paper)

  11. Application of purse-string suture for management of duodenal stump in radical gastrectomy

    Institute of Scientific and Technical Information of China (English)

    SHAO Qin-shu; WANG Yong-xiang; YE Zai-yuan; ZHAO Zhong-kuo; XU Ji

    2011-01-01

    Background Gastric cancer (GC) is the second leading cause of cancer mortality worldwide,and surgical resection is currently the only possible curative approach. Duodenal stump leakage is the most serious complication after radical gastrectomy,and optimal treatment is still lacking.Methods We retrospectively reviewed 2034 cases of total or subtotal gastrectomy for GC from January 1995 to December 2009,including 465 cases of duodenal stump closure using purse-string suture (group A),835 cases of duodenal stump treated with linear cutting stapler and seromuscular layer suture (group B),and 734 cases of duodenal stump closure using full-thickness and seromuscular layer suture (group C). We evaluated the surgical cost,operative time for duodenal stump closure,short-term postoperative complications,perioperative blood loss,and postoperative recovery.Results There was no perioperative mortality in any group. Ninety-four postoperative (within 1 month) complications occurred:18 abdominal bleeding,14 anastomotic leakage,15 abdominal infection,36 wound infection,and 11 duodenal stump leakage. There was no significant difference among the groups in intra-abdominal hemorrhage,anastomotic leakage,abdominal infection and wound infection. No postoperative duodenal stump leakage occurred in group A,which had a significant difference compared with groups B and C (6 cases in group B and 5 cases in group C suffered duodenal stump leakage. P <0.01). The surgical cost in groups A and C was significantly lower than in group B (P <0.01),with no significant difference between groups A and C. The processing time for duodenal stump closure in groups A and B was significantly shorter than in group C (P <0.01),with no significant difference between groups A and B. There was no significant difference in blood loss and postoperative recovery among the groups.Conclusions Duodenal stump closure using purse-string suture seems to be a promising approach with shorter operative time,and lower

  12. [Patients with gastric cancer submitted to gastrectomy: an integrative review].

    Science.gov (United States)

    Mello, Bruna Schroeder; Lucena, Amália de Fátima; Echer, Isabel Cristina; Luzia, Melissa de Freitas

    2010-12-01

    This study aims to analyze the scientific production about patients with gastric cancer submitted to gastrectomy and describe important aspects of nursing guidelines for these patients. An integrative review was carried out using Literatura Latino-Americana e do Caribe em Ciências da Saúde (LILACS) and Medical Literature Analysis and Retrieval System Online (MEDLINE) databases; twenty two articles were analyzed. Retrospective cross-sectional studies were the most frequent. The scientific production of nursing is numerically small in relation to the medical area. The results show that approaches related to pre and post-operative in gastrectomy for gastric cancer resection subsidize the knowledge of issues essential for nurses to promote efficient intervention for the recovery of such patients. There is still the need for further research on the practice of nursing in the guidelines of this kind of surgery. PMID:21805893

  13. Small Intestinal Bacterial Overgrowth in Post Oesophagectomy and Gastrectomy Patients

    OpenAIRE

    Dooley, Melissa

    2015-01-01

    A review of patients who underwent a hydrogen breath test for Small Intestinal Bacterial Overgrowth, following an oesophagectomy or gastrectomy was carried out in the Gastrointestinal Function Unit, St. James’s Hospital, Dublin. The aim of this research was to look at the incidence of Small Intestinal Bacterial Overgrowth and create an optimal protocol for Hydrogen Breath Testing with the hope of improving patient compliance and reducing clinic waiting times. Factors such as lifestyle, multim...

  14. Beneficial effects of continual jejunal interposition after subtotal gastrectomy

    Institute of Scientific and Technical Information of China (English)

    SUN Yuan-shui; YE Zai-yuan; ZHANG Qin; ZHANG Wei; WANG Yuan-yu; L(U) Zhen-ye; XU Ji

    2012-01-01

    Background The ideal post-gastrectomy reconstruction procedure should maintain the normal digestive function and restore intestinal transit to improve the patient quality of life.The aim of this study was to evaluate the effects of integral continual jejunal interposition after subtotal gastrectomy on the nutritional status,glucose levels,and gastric-intestinal motility.Methods The study investigated the effects of the integral continual jejunal interposition,the Billroth Ⅰ and Billroth Ⅱ operations,and the isolated jejunal interposition following subtotal distal gastrectomy on the blood glucose,insulin,routine blood parameters,liver function,and myoelectrical activity in Beagle dogs.Results The weights of the dogs decreased during the first post-operative weeks.Dogs in the integral continual jejunal interposition,Billroth Ⅰ,and Billroth Ⅱ groups gained significantly more weight by 8 weeks.The prognosis nutrition index of the dogs decreased in the first 2 post-operative weeks and increased significantly by 4 weeks in the integral continual jejunal interposition and Billroth Ⅰ groups.The group with duodenal exclusion (Billroth Ⅱ) had significantly higher glucose levels compared to the normal control group.The insulin curve was much higher in dogs that underwent the Billroth Ⅰ,continual jejunal interposition,and isolated jejunal interposition than the Billroth Ⅱ and normal groups.The frequencies of fasting and postprandial jejunal pacesetter potentials (PPs) were greater in the continual jejunal interposition and Billroth Ⅰ groups than that in the isolated jejunal interposition and Billroth Ⅱ groups.The percentage of aboral propagation of PPs was greater in the continual jejunal interposition group than the Billroth Ⅰ,isolated jejunal interposition,and Billroth Ⅱ groups.Conclusion Continual jejunal interposition after subtotal gastrectomy avoids jejunal transection,maintains the duodenal passage and food storage bags,and reduces the influence

  15. Gastrectomy and subsequent risk of oesophageal cancer in Milan.

    OpenAIRE

    La Vecchia, C; D'Avanzo, B; Negri, E; Franceschi, S.; Boyle, P.

    1994-01-01

    STUDY OBJECTIVE--To analyse quantitatively the relationship between gastrectomy and oesophageal cancer risk. DESIGN--This was a case-control study, based on a structured questionnaire that included a problem-oriented medical history. SETTING--A network of hospitals in the Greater Milan area between 1984 and 1992. SUBJECTS--Subjects were 316 incident, histologically confirmed cases of oesophageal cancer (258 males and 58 females), and 1408 controls (1031 males, 377 females), admitted to hospit...

  16. Absorption of biliary cobalamin in baboons following total gastrectomy

    International Nuclear Information System (INIS)

    Absorption of radiolabeled cobalamin in baboons was assessed by whole body counting. Retention of biliary cobalamin and an aqueous solution of cyanocobalamin was measured in normal baboons and in baboons after total gastrectomy by using 57Co-labeled biliary cobalamin and 58C0-cyanocobalamin, with and without baboon gastric juice containing intrinsic factor. Radiolabeled biliary cobalamin was obtained by intravenous injection of 57Co-cyanocobalamin in baboons and collection of bile through a cannula placed in the common bile duct. Cobalamin absorption was not completely abolished by gastrectomy and biliary cobalamin was better retained than cyanocobalamin; intrinsic factor enhanced absorption of both forms. After gastrectomy there was steady depletion of liver and serum cobalamin levels, which ceased after a new equilibrium was reached between a progressively diminishing cobalamin loss and the impaired but significant residual level of absorption. These studies in the nonhuman primate provide further information concerning the enterohepatic circulation of cobalamin and suggest that the form of cobalamin in bile may be more readily absorbed than is cyanocobalamin or that bile itself may have an enhancing effect on cobalamin absorption. The data also suggest that physiologically significant amounts of cobalamin may be absorbed in the absence of a gastric source of intrinsic factor

  17. Ileocecal Inter positional Graft for Gastric Replacement after Total Gastrectomy

    International Nuclear Information System (INIS)

    The aim of this study is to evaluate the technique of ileocecal segment inter positional graft after total gastrectomy for gastric cancer with assessment of its advantages and disadvantages. Patients and methods: This is a prospective study carried out at the National Cancer Institute, Cairo University. Twenty four patients with gastric carcinoma were identified from December 1998 to February 2003. All of them were submitted to surgery after preoperative clinical, radiological and endoscopic diagnosis. Total gastrectomy with ileocecal inter positional graft were done (19 sub diaphragmatic reconstruction and 5 intrathoracic reconstruction). Patients were followed up for at least 12 months for postoperative morbidity, body weight, reflux and dumping symptoms. Gastrografin swallow, barium swallow, upper GIT endoscopy were routinely done in all patients and pouch emptying time by Tc-99m sulphur colloid was done in 11 patients only. Perioperative mortality was 8.3% (2/24). No patient reported reflux symptoms or showed endoscopic findings of reflux esophagitis in the sub diaphragmatic reconstruction group and mild reflux was noted in only one patient in the intrathoracic reconstruction group. No patient reported dumping symptoms. Emptying time showed good capacity as a reservoir of food. Postoperative decrease in body weight averaged less than 10% of preoperative weight. Ileocecal interposition graft after total gastrectomy has the advantages of preventing reflux esophagitis and providing functional replacement of the stomach as a reservoir for ingested food. It can be done with acceptable morbidity and mortality. It is simpler than some of the pouch reconstructions and deserves more attention

  18. Production of extremely deep sleeves by backward cold extrusion

    Directory of Open Access Journals (Sweden)

    Labanova Nadja

    2015-01-01

    Full Text Available The production of extremely deep sleeves by backward cold extrusion has drawn significant attention and interest in recent years in metal forming area, due to their unique and superior properties and their economic and technological advantages. This work describes the limitation related to buckling of extrusion punch during backward extrusion process and also represents the design of a new tool concept to avoid such risks of effects. Application of this tool concept for many cases in industry provides new opportunities to produce deep sleeves with ratio of the overall height of a sleeve (H to its inner diameter (d higher than three within one process stage by backward cold extrusion. Developed concept of tool has been supported by previous fundamental and applied research studies.

  19. Weighing the Options: Gastric Sleeve Surgery

    Medline Plus

    Full Text Available ... everyone else on board as a team, as far as the medical doctor, the nutritionist, the exercise ... en-y gastric bypass and the band as far as the amount of weight you can lose ...

  20. Simultaneous video-assisted thoracoscopic surgery sleeve lobectomy and thymectomy.

    Science.gov (United States)

    Xie, Dong; Xie, Huikang; Zhu, Yuming; Jiang, Gening

    2014-08-01

    Thymic carcinoid tumour associated with pulmonary squamous cell carcinoma is very rare. We present a case of synchronous lung cancer and mediastinal tumour treated with simultaneous video-assisted thoracoscopic surgery (VATS) sleeve lobectomy and thymectomy. A 67-year old man presented with cough and bloody sputum. Chest computed tomography showed an anterior mediastinal mass with a right hilar nodule. A right upper sleeve lobectomy and a thymectomy were performed via a VATS approach. Thymic carcinoid tumour associated with pulmonary squamous cell carcinoma was diagnosed, and the patient received adjuvant radiochemotherapy. PMID:24748606

  1. Fatigue Damage Mechanism of Oil Film Bearing Sleeve

    Institute of Scientific and Technical Information of China (English)

    HUANG Qing-xue; WANG Jian-mei; MA Li-feng; ZHAO Chun-jiang

    2007-01-01

    With the rapid development of the steel industry, to keep pace with the current trend of high speed, continuous, and large-scale production that focuses on automation and high levels of efficiency, many state-owned steel companies are being equipped with oil film bearings. Through long-term on-spot inspection and research on the fatigue failure of oil film bearing, three segments of annulated fatigue breakage were found axially along the inner surface of the bearing sleeve. In order to elucidate the reason for the three-segment annulated damage under rolling load, numerical boundary element method was adopted to analyze the contact behaviors between the sleeve and rollneck. Failure mechanism was discussed in detail, the distributions of contact stress were analyzed, and the service lives of the sleeve for different positions on the inner surface were quantitatively described, which provided an effective means to decrease wear and adhesive damage of the sleeve and to increase the load capacity of oil film bearing and its service life as well.

  2. Developing of chromium cast steel on sleeves of heavy machines

    Directory of Open Access Journals (Sweden)

    J. Kilarski

    2010-10-01

    Full Text Available The results of investigations of hardness, impact resistance, abrasive and corrosive wear of selected chromium cast steel with destination on sleeves of heavy machines were introduced in the article. First results of exploational investigations talked over on the end.

  3. The sleeve monopole antenna in a warm plasma

    International Nuclear Information System (INIS)

    The theoretical analysis of a sleeve monopole antenna which has the length of about plasma wavelength and is placed in an isotropic plasma, was performed in the frequency range where electron plasma waves exist, and the current distribution and the input impedance were obtained. When the Landau attenuation is not considered, the current distribution oscillated largely near the plasma frequency similarly to the case of dipole, and approaches to a triangular distribution with the further increase of the frequency. The input impedance also varies remarkably owing to the sleeve length near the plasma frequency. When the Landau attenuation is considered, the amplitude of the oscillation component of current distribution becomes very small, and it was found that the effect of the sleeve part with the length of 25 times as long as the Debye length was able to be neglected in the input impedance. The results of analysis were compared with the results of experiment. The measured values of input impedance were in good agreement with those of analysis. It was found that the sleeve part, which is an external conductor of a coaxial power line, has the effect to reduce the input impedance. (Kato, T.)

  4. Heat-shrinkable sleeve aids in insulating universal joints

    Science.gov (United States)

    Green, W. S.; Thompson, F. W.

    1980-01-01

    Tubing stiffens joint so that it can be alined with spline fitting; unsleeved joint would normally droop, making it difficult to attach to splines. Sleeve technique saves time and effort when assembling nonrigid parts by making special holding tools or fixtures unnecessary. Tubing also protects joint from dust and other contamination.

  5. Weighing the Options: Gastric Sleeve Surgery

    Medline Plus

    Full Text Available ... just stay in place? It’s essentially a permanent structure. Some patients actually feel that you could take it out once they get to the health or the weight loss goal, but 95% of patients regain weight when the band ...

  6. Weighing the Options: Gastric Sleeve Surgery

    Medline Plus

    Full Text Available ... no contamination of the wound because it’s being protected there. Unless it breaks. So, you are going ... you can put more saline it. So, that’s why it’s an adjustable band. So, it’s adjustable, and ...

  7. Clinicopathological characteristics and prognosis of early gastric cancer after gastrectomy

    Institute of Scientific and Technical Information of China (English)

    WANG Yong-xiang; SHAO Qin-shu; YANG Qiong; WANG Yuan-yu; YANG Jin; ZHAO Zhong-kuo; XU Ji; YE Zai-yuan

    2012-01-01

    Background Assessment of lymph node metastasis (LNM) is important in early gastric cancer (EGC) and affects treatment decisions.However,the relationship between clinicopathological characteristics and LNM in EGC remains unclear.This study therefore explored favorable predictors of LNM in EGC.Methods A total of 716 specimens from gastric cancer patients who underwent curative gastrectomy between 1996 and 2003 at Zhejiang Provincial People's Hospital were reviewed.Forty-five cases were EGC,and clinicopathological characteristics such as gender,age,tumor size,location,gross type,differentiation,invasion depth,and vessel involvement were assessed to identify predictive factors for LNM and survival time.Results The overall cumulative 5-year survival rate of EGC patients was 88.92%.Among these,22.4% developed LNM,which was associated with a poor 5-year survival rate of only 72.7%.Patients with tumors larger than 2 cm in diameters,with depth of tumor invasion to the submucosa,and with positive lymphatic or nerve involvement were also inclined to have poorer survival performances.EGC limited to the mucosa but poorly differentiated also had a high risk for LNM.Multivariate analysis identified lymphatic invasion and tumor size as independent prognosis factors related to survival in EGC patients.Conclusions Careful planning is required in EGC patients at high risk of lymph node metastases.Endoscopic mucosal resection or endoscopic submucosal dissection and laparoscopic partial gastrectomy should be cautiously used in EGC,and curative gastrectomy including lymphatic dissection and postoperative adjuvant therapy might be considered to improve the prognosis.

  8. Duodenal fistula after gastrectomy: retrospective study of 13 new cases

    Directory of Open Access Journals (Sweden)

    María de los Ángeles Cornejo

    2016-01-01

    Full Text Available Introduction: Duodenal stump fistula (DSF after gastrectomy has a low incidence but a high morbidity and mortality, and is therefore one of the most aggressive and feared complications of this procedure. Material and methods: We retrospectively evaluated all DSF occurred at our hospital after carrying out a gastrectomy for gastric cancer, between January 1997 and December 2014. We analyzed demographic, oncologic, and surgical variables, and the evolution in terms of morbidity, mortality and hospital stay. Results: In the period covered in this study, we performed 666 gastrectomies and observed DSF in 13 patients (1.95%. In 8 of the 13 patients (61.5% surgery was the treatment of choice and in 5 cases (38.5% conservative treatment was carried out. Postoperative mortality associated with DSF was 46.2% (6 cases. In the surgical group, 3 patients developed severe sepsis with multiple organ failure, 2 patients presented a major hematemesis which required endoscopic haemostasis, 1 patient had an evisceration and another presented a subphrenic abscess requiring percutaneous drainage. Six patients (75% died despite surgery, with 3 deaths in the first 24 hours of postoperative care. The 2 patients who survived after the second surgical procedure had a hospital stay of 45 and 84 days respectively. In the conservative treatment group the cure rate was 100% with no significant complications and an average postoperative hospital stay of 39.5 days (range, 26-65 days. Conclusion: FMD is an unusual complication but it is associated with a high morbidity and mortality. In our experience, conservative management has shown better results compared with surgical treatment.

  9. EFFECTS OF ENTERAL AND PARENTERAL NUTRITION ON GASTROENTERIC HORMONES AND GASTRIC MOTILITY AFTER SUBTOTAL GASTRECTOMY

    Institute of Scientific and Technical Information of China (English)

    Wei-ming Kang; Jian-chun Yu; Qun Zhang; Mei-yun Ke; Jia-ming Qian

    2008-01-01

    Objective To investigate the effects of enteral nutrition (EN) and parenteral nutrition (PN) on gastric motilityand gastroenteric hormones after subtotal gastrectomy.Methods Forty-one patients underwent gastrectomy were randomly divided into EN group ( n = 20) and PN group (n =21 ). From the fast postoperative day to the seventh day, patients received either EN (EN group) or PN (Pnplasma motilin (MTL), and plasma cholecystokinin (CCK) were measured on preoperative day, the fast and seventh postoperative day. Electrogastrography (EGG) was measured on preoperative day and the seventh postoperative day.Results Compared with preoperation, blood GAS, MTL, and CCK levels of 41 patients decreased significantlyon the first day after subtotal gastrectomy (P<0. 001), but returned to the preoperative levels one week later. EGG after gastrectomy showed that gastric basal electrical rhythm was significantly restrained ( P <0. 001 ). On the seventh day after subtotal gastrectomy, plasma MTL and CCK levels in EN group were higher than those in PN group ( P < 0.05 ).There was no difference in GAS level between two groups. EGG in EN group was better than that in PN group postoper-atively.Conclusions The levels of gastroenteritic hormones and the gastric motility decrease significantly after subtotal gastrectomy. In contrast with PN, EN can accelerate the recovery of MTL, CCK, and gastric motility after subtotal gastrectomy.

  10. Is prophylactic placement of drains necessary after subtotal gastrectomy?

    Institute of Scientific and Technical Information of China (English)

    Manoj Kumar; Seung Bong Yang; Vijay Kumar Jaiswal; Jay N Shah; Manish Shreshtha; Rajesh Gongal

    2007-01-01

    AIM: To determine the evidence-based values of prophylactic drainage in gastric cancer surgery.METHODS: One hundred and eight patients, who underwent subtotal gastrectomy with D1 or D2 lymph node dissection for gastric cancer between January 2001 and December 2005, were divided into drain group or no-drain group. Surgical outcome and post-operative complications within four weeks were compared between the two groups.RESULTS: No significant differences were observed between the drain group and no-drain group in terms of operating time (171±42 min vs 156±39 min), number of post-operative days until passage of flatus (3.7±0.5d vs 3.5±1.0 d), number of post-operative days until initiation of soft diet (4.9±0.7 d vs 4.8±0.8 d), length of post-operative hospital stay (9.3±2.2 d vs 8.4±2.4 d), mortality rate (5.4% vs 3.8%), and overall postoperative complication rate (21.4% vs19.2%).CONCLUSION: Prophylactic drainage placement is not necessary after subtotal gastrectomy for gastric cancer since it does not offer additional benefits for the patients.

  11. Laparoscopic and robot-assisted gastrectomy for gastric cancer: Current considerations.

    Science.gov (United States)

    Caruso, Stefano; Patriti, Alberto; Roviello, Franco; De Franco, Lorenzo; Franceschini, Franco; Coratti, Andrea; Ceccarelli, Graziano

    2016-07-01

    Radical gastrectomy with an adequate lymphadenectomy is the main procedure which makes it possible to cure patients with resectable gastric cancer (GC). A number of randomized controlled trials and meta-analysis provide phase III evidence that laparoscopic gastrectomy is technically safe and that it yields better short-term outcomes than conventional open gastrectomy for early-stage GC. While laparoscopic gastrectomy has become standard therapy for early-stage GC, especially in Asian countries such as Japan and South Korea, the use of minimally invasive techniques is still controversial for the treatment of more advanced tumours, principally due to existing concerns about its oncological adequacy and capacity to carry out an adequately extended lymphadenectomy. Some intrinsic drawbacks of the conventional laparoscopic technique have prevented the worldwide spread of laparoscopic gastrectomy for cancer and, despite technological advances in recent year, it remains a technically challenging procedure. The introduction of robotic surgery over the last ten years has implied a notable mutation of certain minimally invasive procedures, making it possible to overcome some limitations of the traditional laparoscopic technique. Robot-assisted gastric resection with D2 lymph node dissection has been shown to be safe and feasible in prospective and retrospective studies. However, to date there are no high quality comparative studies investigating the advantages of a robotic approach to GC over traditional laparoscopic and open gastrectomy. On the basis of the literature review here presented, robot-assisted surgery seems to fulfill oncologic criteria for D2 dissection and has a comparable oncologic outcome to traditional laparoscopic and open procedure. Robot-assisted gastrectomy was associated with the trend toward a shorter hospital stay with a comparable morbidity of conventional laparoscopic and open gastrectomy, but randomized clinical trials and longer follow-ups are

  12. Laparoscopic and robot-assisted gastrectomy for gastric cancer: Current considerations

    Science.gov (United States)

    Caruso, Stefano; Patriti, Alberto; Roviello, Franco; De Franco, Lorenzo; Franceschini, Franco; Coratti, Andrea; Ceccarelli, Graziano

    2016-01-01

    Radical gastrectomy with an adequate lymphadenectomy is the main procedure which makes it possible to cure patients with resectable gastric cancer (GC). A number of randomized controlled trials and meta-analysis provide phase III evidence that laparoscopic gastrectomy is technically safe and that it yields better short-term outcomes than conventional open gastrectomy for early-stage GC. While laparoscopic gastrectomy has become standard therapy for early-stage GC, especially in Asian countries such as Japan and South Korea, the use of minimally invasive techniques is still controversial for the treatment of more advanced tumours, principally due to existing concerns about its oncological adequacy and capacity to carry out an adequately extended lymphadenectomy. Some intrinsic drawbacks of the conventional laparoscopic technique have prevented the worldwide spread of laparoscopic gastrectomy for cancer and, despite technological advances in recent year, it remains a technically challenging procedure. The introduction of robotic surgery over the last ten years has implied a notable mutation of certain minimally invasive procedures, making it possible to overcome some limitations of the traditional laparoscopic technique. Robot-assisted gastric resection with D2 lymph node dissection has been shown to be safe and feasible in prospective and retrospective studies. However, to date there are no high quality comparative studies investigating the advantages of a robotic approach to GC over traditional laparoscopic and open gastrectomy. On the basis of the literature review here presented, robot-assisted surgery seems to fulfill oncologic criteria for D2 dissection and has a comparable oncologic outcome to traditional laparoscopic and open procedure. Robot-assisted gastrectomy was associated with the trend toward a shorter hospital stay with a comparable morbidity of conventional laparoscopic and open gastrectomy, but randomized clinical trials and longer follow-ups are

  13. Radionuclide methods in estimating after-effects of gastrectomy for cancer

    International Nuclear Information System (INIS)

    The fat, protein and B12 absorption by the liver, kidney and, small intestine was studied by radionuclide methods in gastric cancer patients during the preoperative period as well as within 15-30 days, 3-12 months and for more than a year following gastrectomy. It was observed that the function of the kidney, liver and B12 absorption was disturbed during the preoperative period. Gastrectomy caused a marked depression of the renal, hepatic and small intestinal function. During later periods following gastrectomy, these functions improved but were not restored to normal

  14. Sleeve resection for delayed presentation of traumatic bronchial transection.

    LENUS (Irish Health Repository)

    Mohamed, H Y

    2010-02-01

    Tracheobronchial disruption is uncommon in blunt chest trauma. Many of these patients die before reaching the hospital. In the majority of survivors diagnosis is occasionally delayed resulting in complications like airway stenosis and lung collapse. Thus it is important to have radiological follow up after severe thoracic trauma. Sleeve resection can be an excellent option to conserve lung tissue in delayed presentation of bronchial transection.

  15. Pulmonary artery pseudoaneurysm after a left upper sleeve lobectomy

    OpenAIRE

    Bao, Minwei; Zhou, Yiming; Jiang, Gening; Chen, Chang

    2013-01-01

    A 55-year-old man was re-admitted for persistent hemoptysis and high fever three weeks after an initial left upper sleeve lobectomy for a central squamous lung cancer tumor. Pulmonary artery pseudoaneurysm and pulmonary infection were confirmed by multidetector computed tomography angiography and subsequent emergency completion pneumonectomy. The development of pulmonary artery pseudoaneurysm, secondary to post-operative pulmonary infection and pulmonary vascular manipulation, is rare and pro...

  16. Elastic Knee Sleeves Limit Anterior Tibial Translation in Healthy Females

    Directory of Open Access Journals (Sweden)

    Robert Csapo, Simona Hosp, Ramona Folie, Robert Eberle, Michael Hasler, Werner Nachbauer

    2016-03-01

    Full Text Available Knee sleeves or braces represent auxiliary tools that have repeatedly been used by athletes, in an attempt to increase knee stability and, thus, reduce the risk of (recurrent ligamentous injuries. Since ACL injuries typically occur in situations involving either torsion or hyperextension of the knee, it has been speculated that braces might protect the ACL by countering excessive anterior translation of the tibia with respect to the femur (Beynnon et al., 1997. However, the preponderance of in vivo studies to test this hypothesis was performed in cohorts of patients suffering from existent ligamentous (Branch et al., 1988; Colville et al., 1986 or other knee injury (Beynnon et al., 1997; Fleming et al., 2000. This complicates the extrapolation of results to healthy subjects. Further, the braces used in these studies were mostly rigid constructs that consisted of either uni- or bilateral hinged bars (Rishiraj et al., 2009. Such braces might hinder performance (Veldhuizen et al., 1991 and would be rejected by the vast majority of healthy athletes. For these reasons, we would like to use this letter to the editor to report the results of our experiments investigating whether a relatively light elastic knee sleeve would limit the degree of anterior tibial translation in computerized arthrometry tests as performed in a sample of non-injured subjects. We recruited ten female college students (age: 23.4 ± 3.2 yrs, height: 1.68 ± 0.05 m, mass: 59.9 ± 5.5 kg who were free of acute or previous injury or any form of orthopaedic disease of the knee joints. The anterior displacement of the tibia was measured using the GNRB® computerized arthrometer (GeNouRob, Laval, France. With subjects lying in the supine position, the lower leg was firmly fixed with plastic caps mounted over the ankle joint and patella. An electrical pressure pad then exerted increasing pressure of up to 250 N on the calf, while a motion sensor, which was positioned on the ventral

  17. The sleeve monopole antenna in a warm plasma

    International Nuclear Information System (INIS)

    Many authors have reported the studies of an unbalanced-fed oblate spheroidal and a spherical antenna immersed in a warm plasma. In their analyses the effect of a transmission line as a radiating element is neglected. In this paper a sleeve monopole antenna which consists of a cylindrical monopole antenna of radius 1mm and a semi-rigid coaxial cable of radius 1.1mm feeding the sleeve is studied in the frequency region of electron plasma wave propagation. The experiments were performed in a cylindrical bell jar with a diameter of 30 cm and a length of 50 cm. The plasma was created by ionizing collisions of energetic electrons with the background argon atoms at pressures of 10/sup -3/ torr. The measured electron temperature and plasma density are about 3-5eV and 10/sup 8/ cm/sup -3/ respectively. The impedance of the sleeve antenna was measured by RF impedance analyzer as a function of frequency

  18. Laparoscopic Gastrectomy and Transvaginal Specimen Extraction in a Morbidly Obese Patient with Gastric Cancer.

    Science.gov (United States)

    Sumer, Fatih; Kayaalp, Cuneyt; Karagul, Servet

    2016-03-01

    Laparoscopic gastrectomy for cancer has some significant postoperative benefits over open surgery with similar oncologic outcomes. This procedure is more popular in the Far East countries where obesity is not a serious public health problem. In the Western countries, laparoscopic gastrectomy for cancer is not a common procedure, yet obesity is more common. Herein, we aimed to demonstrate the feasibility of laparoscopic gastrectomy for advanced gastric cancer in a morbidly obese patient. Additionally, we used natural orifice specimen extraction as an option to decrease wound-related complications, which are more prevalent in morbidly obese patients. In this case, we performed a fully laparoscopic subtotal gastrectomy with lymph node dissection and Roux-en-Y gastrojejunostomy with the specimen extracted through the vagina. To the best of our knowledge, this was the first report of a natural orifice surgery in a morbidly obese patient with gastric cancer. PMID:27104027

  19. Post-gastrectomy acute pancreatitis in a patient with gastric carcinoma and pancreas divisum

    Institute of Scientific and Technical Information of China (English)

    I-Ming Kuo; Frank Wang; Keng-Hao Liu; Yi-Yin Jan

    2009-01-01

    Gastrectomy is commonly performed for both benign and malignant lesions. Although the incidence of post-gastrectomy acute pancreatitis (PGAP) is low compared to other well-recognized post-operative complications, it has been reported to be associated with a high mortality rate. In this article, we describe a 70-year-old man with asymptomatic pancreatic divisum who underwent palliative subtotal gastrectomy for an advanced gastric cancer with liver metastasis. His postoperative course was complicated by acute pancreatitis and intra-abdominal sepsis. The patient eventually succumbed to multiple organ failure despite surgical debridement and drainage, together with aggressive antibiotic therapy and nutritional support. For patients with pancreas divisum or dominant duct of Santorini who fail to follow the normal post-operative course after gastrectomy, clinicians should be alert to the possibility of PGAP as one of the potential diagnoses. Early detection and aggressive treatment of PGAP might improve the prognosis.

  20. Mechanism Research on Melting Loss of Coppery Tuyere Small Sleeve in Blast Furnace

    Science.gov (United States)

    Chai, Yi-Fan; Zhang, Jian-Liang; Ning, Xiao-Jun; Wei, Guang-Yun; Chen, Yu-Ting

    2016-01-01

    The tuyere small sleeve in blast furnace works under poor conditions. The abnormal damage of it will severely affect the performance of the blast furnace, thus it should be replaced during the damping down period. So it is of great significance that we study and reduce the burnout of tuyere small sleeve. Melting loss is one case of its burnout. This paper studied the reasons of tuyere small sleeve's melting loss, through computational simulation and microscopic analysis of the melting section. The research shows that the temperature of coppery tuyere small sleeve is well distributed when there is no limescale in the lumen, and the temperature increases with the thickness of limescale. In addition, the interruption of circulating water does great harm to the tuyere small sleeve. The melting loss of tuyere small sleeve is caused by iron-slag erosion, with the occurrence of the melt metallurgical bonding and diffusion metallurgical combination.

  1. Bimetallic sleeve for repairing a heat exchanger tube locally damaged and repairing process of a such tube with this sleeve

    International Nuclear Information System (INIS)

    A tubular sleeve comprising two end sections made of the same metal as the heat exchanger tube and connected by a ring of an alloy suitable for welding is inserted into the tube and welded in place from the inside. The tube and end sections may be of Incoloy 800 while the ring is in Ni-Cr Alloy, Inconel 600 or Inconel 690. 3 figs

  2. Segmental gastrectomy with radical lymph node dissection for early gastric cancer

    Institute of Scientific and Technical Information of China (English)

    Takeru; Matsuda; Kunihiko; Kaneda; Manabu; Takamatsu; Keishi; Aishin; Masahide; Awazu; Akiko; Okamoto; Katsunori; Kawaguchi

    2010-01-01

    AIM: To describe a new surgical technique and evaluate the early results of segmental gastrectomy (SG) with modified D2 lymph node (LN) dissection for early gastric cancer (EGC). METHODS: Fourteen patients with EGC underwent SG with modified D2 dissection from 2006 to 2008. Their operative results and postoperative courses were compared with those of 17 patients who had distal gastrectomy (DG) for EGC during the same period. RESULTS: Operating time, blood loss, and hospital stay were similar between the 2 g...

  3. Complications after radical gastrectomy following FOLFOX7 neoadjuvant chemotherapy for gastric cancer

    OpenAIRE

    Ren Hui; Wu Qi; Zong Xiang-Long; Wu Xiao-Jiang; Wu Ai-Wen; Bu Zhao-De; Zhang Lian-Hai; Shan Fei; Li Zi-Yu; Ji Jia-Fu

    2011-01-01

    Abstract Background This study assessed the postoperative morbidity and mortality occurring in the first 30 days after radical gastrectomy by comparing gastric cancer patients who did or did not receive the FOLFOX7 regimen of neoadjuvant chemotherapy. Methods We completed a retrospective analysis of 377 patients after their radical gastrectomies were performed in our department between 2005 and 2009. Two groups of patients were studied: the SURG group received surgical treatment immediately a...

  4. Research and Design of Sleeve Detach and Reunion Drive Mechanism of Screw Melt Extruder Equipment

    Institute of Scientific and Technical Information of China (English)

    Xiude ZHANG

    2012-01-01

    The design of sleeve detach and reunion drive device of screw melt ex- truder equipment was optimized, based on the present installation of hygraulic drive device to achieve the mechanical opening and closing of the sleeve, the dynamic model of the sleeve detach and reunion drive was theoretically measured, and it was verified that the device is simple to operate and convenient to maintain, thus it has great social values.

  5. Operation experiences of the steam generator repair technique by means of weldless sleeves

    International Nuclear Information System (INIS)

    Field performances of the weldless PLUSS sleeve up to these days establishes it as a reliable technique for use as tube-in-tube repair of damaged tubing of steam generators customarily served by nuclear reactors. For the functioning of the weldless PLUSS Sleeve the proper combination of tube and sleeve material is decisive. It turned out that for steam generator tubing of Inconel Alloy 600 and Inconel Alloy 690 the sleeve out of Incoloy Alloy 800 serves this purpose perfectly. Via hydraulic expansion the weldless sleeve of Incoloy Alloy 800 is permanently fixed against the parent tube of Inconel Alloys 600/690. Upon relieving the exerted hydraulic pressure, the tube springs back more than the sleeve does, the net effect being that there materializes an interference at the interface between sleeve and tube. The PLUSS sleeve, while spanning the defective zone of the tube, takes the advantage of this phenomenon to secure the sleeve within the tube at ambient temperature. Emergence of the unique expansion joint of the PLUSS sleeve is the result. At higher operating temperatures associated with higher system pressures the expansion joint gets even tighter as the interference between the joint members increases owing to the fact that Inconel Alloys 600/690 and Incoloy Alloy 800 possess different coefficients of thermal expansion. The weldless sleeving technique with favourable stress situation and reduced installation steps compared to other kind of sleeving techniques offers a significant improvement in the field application. At present it is probably the most efficient and cost-effective repair technique of all. The paper discusses the working principle of the product and its successful installation in various nuclear power plants worldwide. It further discusses the field application with respect to a particular utility and operational experiences gained so far. Furthermore, the plant performance is dealt with briefly. (author)

  6. Tuberculosis after gastrectomy, plasmatic concentration of antitubercular drugs.

    Science.gov (United States)

    Vittorio, De Socio Giuseppe; Antonio, D'Avolio; Alessio, Sgrelli; Lorena, Baietto; Malincarne, Lisa; Giovanni, Di Perri; Franco, Baldelli

    2012-01-01

    We report pharmacokinetic data on two gastrectomized, patients affected by tuberculosis. Drugs plasmatic concentrations were measured after seven days of oral therapy by a validated high performance liquid chromatography-mass spectrometry (HPLC-MS) method and the area under the concentration-time-curve (AUC) over 24 hours (AUC(0-24)) was calculated. A sub-therapeutic level of isoniazid was found in a patient with total gastrectomy with a C(max) of 0,395 mg\\L and AUC(0-24) level of 4.75 hr*mg/L. The level of the other antitubercular drugs was adequate. These findings support the need to monitor anti tubercular drug levels to facilitate early detection of therapeutic failure, above all in patients treated with isoniazid and with potential problems on oral drugs absorption. PMID:22348189

  7. Additional Gastrectomy after Endoscopic Submucosal Dissection for Early Gastric Cancer Patients with Comorbidities

    Directory of Open Access Journals (Sweden)

    Naohiko Koide

    2012-01-01

    Full Text Available Purpose. We investigated the clinicopathologic features of early gastric cancer (EGC patients who have undergone additional gastrectomy after endoscopic submucosal dissection (ESD because of their comorbidities. Methods. Eighteen (7.1% of 252 GC patients were gastrectomized after prior ESD. Reasons for further surgery, preoperative and postoperative problems, and the clinical outcome were determined. Results. The 18 patients had submucosal EGC and several co-morbidities. Other primary cancers were observed in 8 (44.4%. Histories of major abdominal operations were observed in 6 (33.3%. Fourteen patients (77.8% hoped for endoscopic treatment. Due to additional gastrectomy, residual cancer was suspected in 10, and node metastasis was suspected in 11. A cancer remnant was histologically observed in one. Node metastasis was detected in 3 (16.7%. Small EGC was newly detected in 4. Consequently, additional gastrectomy was necessary for the one third. No patient showed GC recurrence. However, 9 (50% had new diseases, and 4 (22.2% died of other diseases. The overall survival after surgery in these patients with additional gastrectomy was poorer than those with routine gastrectomy for submucosal EGC (=0.0087. Conclusions. Additional gastrectomy was safely performed in EGC patients with co-morbidities. However, some issues, including presence of node metastasis and other death after surgery, remain.

  8. Retrospective Analysis on the Gallstone Disease after Gastrectomy for Gastric Cancer

    Directory of Open Access Journals (Sweden)

    Kyong-Hwa Jun

    2015-01-01

    Full Text Available Background. The aim of this study is to evaluate the incidence of gallstone after gastrectomy, risk factors for gallstone formation, and the surgical outcome of cholecystectomy after gastrectomy. Methods. A total of 2480 gastric cancer patients who underwent curative resection at two institutions between January 1997 and December 2012 were retrospectively reviewed. The patients’ age, gender, diabetes mellitus, type of gastrectomy, extent of node dissection, and type of reconstruction were evaluated. Results. Gallstone formation occurred in 128 of 2480 (5.2% patients who had undergone gastrectomy for gastric cancer. The incidence of gallstones was significantly higher after total compared with subtotal gastrectomy. Roux-en-Y reconstruction and lymph node dissection in the hepatoduodenal ligament were associated with a significantly higher incidence. In multivariate analysis, diabetes mellitus and reconstruction method were identified as significant risk factors for gallstone development. The proportion of silent stone was higher in the laparoscopic cholecystectomy (LC group than in the open cholecystectomy (OC group. Operation time and hospital stay were shorter in the LC group than in the OC group. Conclusions. Diabetes mellitus and Roux-en-Y reconstruction are risk factors for gallstones after gastrectomy. Only a few postoperative complications after subsequent cholecystectomy occurred, even when using a laparoscopic approach.

  9. Reconstruction of the esophagojejunostomy by double stapling method using EEA™ OrVil™ in laparoscopic total gastrectomy and proximal gastrectomy

    Directory of Open Access Journals (Sweden)

    Yano Seiji

    2011-05-01

    Full Text Available Abstract Here we report the method of anastomosis based on double stapling technique (hereinafter, DST using a trans-oral anvil delivery system (EEATM OrVilTM for reconstructing the esophagus and lifted jejunum following laparoscopic total gastrectomy or proximal gastric resection. As a basic technique, laparoscopic total gastrectomy employed Roux-en-Y reconstruction, laparoscopic proximal gastrectomy employed double tract reconstruction, and end-to-side anastomosis was used for the cut-off stump of the esophagus and lifted jejunum. We used EEATM OrVilTM as a device that permitted mechanical purse-string suture similarly to conventional EEA, and endo-Surgitie. After the gastric lymph node dissection, the esophagus was cut off using an automated stapler. EEATM OrVilTM was orally and slowly inserted from the valve tip, and a small hole was created at the tip of the obliquely cut-off stump with scissors to let the valve tip pass through. Yarn was cut to disconnect the anvil from a tube and the anvil head was retained in the esophagus. The end-Surgitie was inserted at the right subcostal margin, and after the looped-shaped thread was wrapped around the esophageal stump opening, assisting Maryland forceps inserted at the left subcostal and left abdomen were used to grasp the left and right esophageal stump. The surgeon inserted anvil grasping forceps into the right abdomen, and after grasping the esophagus with the forceps, tightened the end Surgitie, thereby completing the purse-string suture on the esophageal stump. The main unit of the automated stapler was inserted from the cut-off stump of the lifted jejunum, and a trocar was made to pass through. To prevent dropout of the small intestines from the automated stapler, the automated stapler and the lifted jejunum were fastened with silk thread, the abdomen was again inflated, and the lifted jejunum was led into the abdominal cavity. When it was confirmed that the automated stapler and center rod

  10. Laser welded sleeving - a proven technology for steam generator life enhancement

    International Nuclear Information System (INIS)

    Laser welded sleeving was performed for the first time in the United States in April 1992 at the J.M. Farley Nuclear Plant Unit 2. In all, 68 tube support plate sleeves and 30 tubesheet sleeves were installed in two steam generators. This was followed by a larger sleeving campaign in the plant's Unit 1 steam generators in October 1992 when 148 tube support plate sleeves and 46 tubesheet sleeves were installed in three steam generators. The successful implementation of this new technology at Farley provides the industry with a field proven and effective option to repair steam generator tubes and maintain operating plant performance. The laser welding was performed using a fiber optic delivery system to transmit light energy from a pulsed solid state laser located outside containment to the weld head which could be positioned remotely in the tubesheet and as high as the sixth support plate in the steam generator. The sleeve material was thermally treated Alloy 690 (UNS 06690). The joint design was a partial penetration, autogenous weld. All free-span welds, namely the support plate sleeve welds and the tubesheet sleeve upper weld, were thermally stress relieved to enhance stress corrosion life. Those welds were also required to pass a stringent ultrasonic test examination. All the processes for laser welded sleeving were performed remotely using the Westinghouse steam generator service robot, ROSA III. The Farley campaigns showed that laser welded sleeving offers a high degree of process control not found with other methods and produces welds that can be fully inspected by ultrasonic examination. They also demonstrated the field hardiness of the sophisticated laser welding system. 5 figs

  11. Risk of Dumping Syndrome after Sleeve Gastrectomy and Roux-en-Y Gastric Bypass: Early Results of a Multicentre Prospective Study.

    Science.gov (United States)

    Ramadan, M; Loureiro, M; Laughlan, K; Caiazzo, R; Iannelli, A; Brunaud, L; Czernichow, S; Nedelcu, M; Nocca, D

    2016-01-01

    Background. Bariatric surgery is an important field of surgery. An important complication of bariatric surgery is dumping syndrome (DS). Aims. To evaluate the incidence of DS in patients undergoing bariatric surgery. Methods. 541 patients included from 5 nutrition and bariatric centers in France underwent either LSG or LRYGB. They were evaluated at 1 month (M1) and 6 months (M6) postoperatively by an interview and completion of a dumping syndrome questionnaire. Results. 268 patients underwent LSG (Group A) and 273 underwent LRYGB. From the LRYGB patients 229 had mechanical gastrojejunoanal anastomosis with 30 mm linear stapler (Group B) and 44 had manual (hand sewn) 15 mm gastrojejunal anastomosis (Group C). Overall incidence of DS was 8.5% at M1 and M6. In LSG group (Group A), only 4 patients (1.49%) reported episodes of DS at M1 and 3 (1.12%) at M6. In Group B, 41 patients (17.90%) reported episodes of DS at M1 and 43 (18.78%) at M6. Group C experienced one case (2.27%) of DS at M1 and none (0%) at M6. Conclusions. Patients undergoing LRYGB, especially with larger gastrojejunal anastomosis, are more prone to developing DS following surgery than patients undergoing LSG or LRYGB with calibrated manual anastomosis. PMID:27242898

  12. Effect of insulator sleeve material on neutron emission from a plasma focus

    International Nuclear Information System (INIS)

    Neutron yield from a small (2 kJ) plasma focus using insulator sleeves of different materials is investigated. Experimental results indicate that the neutron yield from plasma foci may be enhanced several times if an insulator sleeve of higher dielectric constant is employed. (orig.)

  13. Failure analysis of rutile sleeves in MC3080 lightning arrestor connectors.

    Energy Technology Data Exchange (ETDEWEB)

    Kilgo, Alice C.; Monroe, Saundra L.; Watson, Chad Samuel; Ernest, Terry L.

    2006-02-01

    The purpose of this SAND Report is to document efforts in the extraction and failure analyses of sleeve-style Lightning Arrestor Connectors (LACs). Several MC3080 and MC3079 LACs were recovered from the field and tested as part of the Enhanced Surveillance Campaign. A portion of these LACs failed retesting. Terry Ernest (01733), the LAC Component Engineer, provided eleven MC3080 LACs for evaluation where four of the LACs failed IR/DCW and one failed FRB requirements. The extraction of rutile sleeves from failed LACs was required to determine the source of failure. Rutile sleeves associated with connector function failures were examined for cracks, debris as well as any other anomalies which could have caused the LAC to not function properly. Sleeves that failed FRB or that experienced high FRB exhibited high symmetry, smooth surface, long-flow amicon, and slightly over-sized inside diameter. LACs that failed DCW or IR requirements had rutile sleeves that exhibited breakdown tracks.

  14. The effect of waterproofing sleeves on the response of FARMER like ionization chambers

    International Nuclear Information System (INIS)

    According to most recent dosimetry protocols, the determination of the absorbed dose to water for photon and electron beams should be performed with non-water-proof ionization chamber along with plastic waterproofing sleeves whose thickness should be less than 1 mm. In these protocols, the correction for the waterproofing sleeve is incorporated in the equation of the perturbation factor pwall. Many SSDLs and hospitals were previously provided with thicker sleeves and are probably still using them for routine calibrations. The objective of the work presented in this paper is to investigate the effect of the waterproofing sleeves on the response of a WELLHOFER IC 70 ionization chambers in a 60Co and two high energy X-ray beams, 6MV and 18 MV. This chamber is inherently waterproof, thus, the ionisation current obtained with sleeves of different thickness is compared to the current obtained without sleeve. The results are improved by performing, for each thickness, at least two series of measurements with and without sleeve. The results show that with 60Co, the ionization response increases from 0.08% to 0.47% for sleeves from 0.75 mm to 1.75 mm. For 6 MV and 18 MV X-rays, the signal decreases respectively by 0.8% and 1%. When taking into account the perturbation correction factor including the waterproofing sleeve component, the ratio R/Ro , where R is the product of the chamber signal and the perturbation factor (the subscript is for the response without sleeve) is increasing from 0.14% to 0.55% for 60Co. For X-rays, this ratio decreases up to 0.75% and 0.59% respectively for 6 MV and for 18 MV. Similar results are obtained with FARMER like ionization chambers

  15. Preexisting Diabetes and Risks of Morbidity and Mortality After Gastrectomy for Gastric Cancer

    Science.gov (United States)

    Tsai, Ming-Shian; Wang, Yu-Chiao; Kao, Yin-Hsien; Jeng, Long-Bin; Kao, Chia-Hung

    2015-01-01

    Abstract The purpose of this study was to determine the risk of surgical mortality and morbidity in patients with diabetes mellitus (DM) undergoing a gastrectomy for gastric cancer (GC). Using the Taiwan National Health Insurance Research Database, we identified 6284 patients who underwent gastrectomy for GC from 1999 to 2010. In addition, we created a non-DM control cohort consisting of 6268 patients who received gastrectomy during the same period. Compared with the non-DM cohort, the DM cohort exhibited a higher prevalence of preoperative coexisting medical conditions, namely hypertension, hyperlipidemia, coronary artery disease, chronic kidney disease, chronic pulmonary disease, stroke, and cirrhosis. The odds ratio (OR) of 30-day postoperative mortality after gastrectomy in the DM cohort was 1.04 (95% confidence interval 0.78–1.40) after we adjusted for covariates. The DM cohort did not exhibit a significantly higher risk of 30-day postoperative morbidities. Further analysis revealed that only patients with a history of a DM-related coma exhibited a higher risk of 30-day postoperative mortality (adjusted OR 2.46, 95% confidence interval 1.10 − 5.54). Moreover, the risk of 90-day postoperative mortality was significantly higher in patients with DM-related eye involvement, coma, peripheral circulatory disease, and renal manifestations, in comparison with the non-DM cohort. The risk of 90-day mortality after gastrectomy for GC is higher in patients with DM-related manifestations than those without DM. PMID:26376386

  16. Influence of Gastrectomy on Cortical and Cancellous Bones in Rats

    Directory of Open Access Journals (Sweden)

    Jun Iwamoto

    2013-01-01

    Full Text Available The aim of the present study was to examine the influence of gastrectomy (GX on cortical and cancellous bones in rats. Twenty male Sprague-Dawley rats were randomized into the two groups of 10 animals each: a sham operation (control group and a GX group. Seven weeks after surgery, the bone mineral content and density (BMC and BMD, resp. and the mechanical strength of the femur were determined, and bone histomorphometric analyses were performed on the tibia. GX induced decreases in the BMC, BMD, ultimate force, work to failure, and stiffness of the femoral distal metaphysis and the BMC, BMD, and ultimate force of the femoral diaphysis. GX induced a decrease in cancellous bone mass, characterized by an increased osteoid thickness, osteoid surface, osteoid volume, and bone formation. GX also induced a decrease in cortical bone mass, characterized by increased endocortical bone resorption. The GX induced reductions in the bone mass and strength parameters were greater in cancellous bone than in cortical bone. The present study showed that the response of bone formation, resorption, and osteoid parameters to GX and the degree of GX-induced osteopenia and the deterioration of bone strength appeared to differ between cortical and cancellous bones in rats.

  17. Laparoscopy-assisted versus open gastrectomy for advanced gastric cancer

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    Objective:A meta-analysis of high-quality clinical studies was performed to compare LAG and open gastrectomy (OG) for AGC.Methods: Meta-analysis was performed using RevMan 5.0 software (Cochrane Library). Results:Twenty studies were included in final pooled analysis, 2RCTs and 17 NRCTs, compromising 3,409 patients (1,640 LAG, 1,709 OG). LAG was associated with longer operative time(P<0.001) and lower overall complications(P=0.001), estimated blood loss(P<0.001) and hospital stay(P<0.001). hTere were no signiifcant differences between two groups in number of lymph node dissection (P=0.65), overall complication (P=0.86), a 5-year overall survival rate (P=0.53) and 5-year recurrence-free survival (P=0.07).Conclusion:Despite a longer operation time, LAG is a safe technical alternative to OG for AGC with a lower complication rate and enhanced postoperative recovery. Moreover, the oncologic outcomes of LAG for AGC patients were comparable with open approach.

  18. Post-gastrectomy patients need to be followed up for 20-30 years

    Institute of Scientific and Technical Information of China (English)

    Frank I. Tovey; Michael Hobsley

    2000-01-01

    AIM To investigate the incidence andmanagement of nutritional deficiencies followinga gastrectomy.METHODS A gastrectomy population of 227patients in London was followed up for 30 years after operation to detect and treat nutritional deficiencies.RESULTS By the end of the first decade iron deficiency was the commonest problem. Vitamin B12 deficiency became more important in the second decade. During the third decade both reached equal prevalence, being found in some 90% of the female and 70% of the male residual population. Vitamin D deficiency was a lesser problem, reaching its climax in the second decade. Overall, all women fared worse than men.CONCLUSION The importance of long-term follow-up of gastrectomy patients for iron,Vitamin B12 and Vitamin D deficiencies is emphasised.

  19. Evaluation of the pylorusfunction after pylorus-preserving distal gastrectomy by the gastrointestinal and biliary scintigraphy

    Energy Technology Data Exchange (ETDEWEB)

    Inada, Takao; Ogata, Yoshiro; Yamamoto, Seichiro; Ando, Jiro; Ozawa, Iwao; Matsui, Junichi; Hishinuma, Shoichi; Shimizu, Hideaki; Kotake, Kenjiro [Tochigi Cancer Center (Japan)

    1999-07-01

    The postoperative function of pylorus-preserving distal gastrectomy (PPDG) was analyzed by gastrointestinal and biliary scintigraphy in 8 patients and compared with that of pre-operative control and conventional distal gastrectomy with Billroth-1 reconstruction (B-1) groups. The mean evacuation times of bile to duodenum of three groups had no significant differences and in the PPDG group, there was no difference in bile evacuation between the pre-and postoperative periods. The regurgitation of bile to the rest stomach was observed in more than 40% of the B-1 group, but was seldom observed in the PPDG group and control group. Gastric emptying after pylorus-preserving distal gastrectomy assessed by gastrointestinal scintigraphy was significantly slower than the control at 6 months after surgery, however, this difference was no longer observed 1 year after surgery. Therefore, pyloric function after PPDG was observed to improve gradually after the surgery. (author)

  20. EVALUATION OF N-RATIO IN SELECTING PATIENTS FOR ADJUVANT CHEMORADIOTHERAPY AFTER D2-GASTRECTOMY

    Directory of Open Access Journals (Sweden)

    Wilson Luiz da COSTA JUNIOR

    2013-12-01

    Full Text Available Context Whether adjuvant chemoradiotherapy may contribute to improve survival outcomes after D2-gastrectomy remains controvertial. Objective To explore the clinical utility of N-Ratio in selecting gastric cancer patients for adjuvant chemoradiotherapy after D2-gastrectomy. Methods A retrospective cohort study was carried out on gastric cancer patients who underwent D2-gastrectomy alone or D2-gastrectomy plus adjuvant chemoradiotherapy (INT-0116 protocol at the Hospital A. C. Camargo from September 1998 to December 2008. Statistical analysis were performed using multiple conventional methods, such as c-statistic, adjusted Cox's regression and stratified survival analysis. Results Our analysis involved 128 patients. According to c-statistic, the N-Ratio (i.e., as a continuous variable presented “area under ROC curve” (AUC of 0.713, while the number of metastatic nodes presented AUC of 0.705. After categorization, the cut-offs provide by Marchet et al. displayed the highest discriminating power – AUC value of 0.702. This N-Ratio categorization was confirmed as an independent predictor of survival using multivariate analyses. There also was a trend of better survival by adding of adjuvant chemoradiotherapy only for patients with milder degrees of lymphatic spread – 5-year survival of 23.1% vs 66.9%, respectively (HR = 0.426, 95% CI 0.150–1.202; P = 0.092. Conclusions This study confirms the N-Ratio as a tool to improve the lymph node metastasis staging in gastric cancer and suggests the cut-offs provided by Marchet et al. as the best way for its categorization after a D2-gastrectomy. In these settings, the N-Ratio appears a useful tool to select patients for adjuvant chemoradiotherapy, and the benefit of adding this type of adjuvancy to D2-gastrectomy is suggested to be limited to patients with milder degrees of lymphatic spread (i.e., NR2, 10%–25%.

  1. Investigation after one cycle on Doel 3 tubes sleeved by Westinghouse

    International Nuclear Information System (INIS)

    At DOEL 3, 55 SG-tubes cracked at the roll transition area were repaired by Westinghouse in 1988 by CO2 laser welded sleeving, with a post weld stress relief. After one cycle two sleeved tubes were pulled out for investigation. The main purpose of this investigation was the correlation with the on-site UT-inspection, performed after sleeving, because surface irregularities of the weld had disturbed the determination of the weld penetration for several tubes. A good correlation between the UT-results and the direct examination is found for the two tubes which are both affected by surface irregularities on the majority of the circumference. Another important goal of the investigation is the verification of the resistance to primary water stress corrosion cracking of the upper joint of the sleeve, namely at the upper transition area and near the weld because the parent tube is very susceptible to this corrosion and because residual stresses could remain after the complete sleeving process. After one year no tube nor sleeve degradation could be observed so that it was decided to maintain the remaining sleeved tubes in service

  2. A study by upper digestive tract scintigraphy of cases with recurrent pneumonia after gastrectomy

    International Nuclear Information System (INIS)

    Five patients with recurrent pneumonia after gastrectomy were studied by upper digestive tract scintigraphy. Severe gastroesophageal reflux was noted in three of the five patients in the supine position. In the other two patients, the same kind of reflux was easily induced by changing position. Esophageal dysfunction was suspected in four patients. The frequency of pneumonia decreased after we instructed the patients how to avoid reflux. We therefore diagnosed it as the chronic aspiration pneumonia. We concluded that upper digestive tract scintigraphy is useful for evaluating gastroesophageal reflux and esophageal function in patients after gastrectomy. (author)

  3. Validation of sleeve of straight union type B for leaks

    Energy Technology Data Exchange (ETDEWEB)

    Teutonico, Mauricio; Fazzini, Pablo [Gie S.A., Buenos Aires (Argentina)

    2009-07-01

    Analytic study and experimental validation of type B sleeve with overlapping, were done in order to determine whether they are suitable for used as permanent leaks repair in hydrocarbons transport lines. All relevant background of this type of repair was analyzed, following the guidelines defined by applicable regulations (ASME B31.8 and ASME B31.4) and modeled by finite elements methods. Solicitations under internal pressure of each one of the reinforcement parts were analyzed. All solicitations involved in welded unions were studied, so as the reinforcement effectiveness when it is filled with internal gap filler. Experimental tests were developed, consisted on the reinforcement installation upon damaged pipes and the following hydrostatic test. These tests were assisted by a digitalized measurement, to determine the solicitations at different parts of the reinforcement; strain gauges were used for this task. (author)

  4. Radiation safety control on Ulchin NPP Unit 1 s/g sleeving

    International Nuclear Information System (INIS)

    Ulchin NPP unit 1 has been entered its tenth operation year. As the operation years went by, S/G tubes' defects have been reported, which was analyzed mainly due to PWSCC through ECT and various studies. In the ninth overhaul, technical staffs of Ulchin unit 1 decided to do sleeve installation for defected tubes. This sleeve installation was a second experience on our plant in KEPCO. The sleeving tubes were estimated to 600 pieces, but increased to 987 pieces by ECT results. As the sleeve installation was performed in high radiation level, we have considered various radiation safety, i e. protection of radiation source and internal exposure. The collective radiation exposure dose was recorded to 142.32 man-mSv and no internal exposed person was discovered. But there are some requirements to improve radiation safety for reducing exposure dose to radiation. PWSCC : Primary Water Side Stress Corrosion Crack (author)

  5. Risk factors for hospital readmission after radical gastrectomy for gastric cancer:a prospective study

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    Objective:hTe purpose of this prospective study was to determine risk factors for readmission within 30 days of discharge after gastrectomy for patients with gastric cancer.Methods: We conducted a prospective study of patients undergoing radical gastrectomy for gastric cancer from October 2013 to November 2014 in our institution. hTe incidence, cause and risk factors for 30-day readmission were determined.Results:A total of 376 patients were included in our analysis without loss in follow-up. hTe 30-day readmission rate after radical gastrectomy for gastric cancer was 7.2% (27 of 376). The most common cause for readmission included gastrointestinal complications and postoperative infections. On the basis of multivariate logistic regression analysis, preoperative nutritional risk screening 2002 score ≥ 3 was an independent risk factor for 30-day readmission. Conclusion:Readmission within 30 days of discharge atfer radical gastrectomy for gastric cancer is common. Patients with nutritional risk preoperatively are at high risk for 30-day readmission.

  6. The effects of stochastic resonance electrical stimulation and neoprene sleeve on knee proprioception

    OpenAIRE

    Olcott Chris W; Blackburn J Troy; Collins Amber T; Dirschl Douglas R; Weinhold Paul S

    2009-01-01

    Abstract Background A variety of knee injuries and pathologies may cause a deficit in knee proprioception which may increase the risk of reinjury or the progression of disease. Stochastic resonance stimulation is a new therapy which has potential benefits for improving proprioceptive function. The objective of this study was to determine if stochastic resonance (SR) stimulation applied with a neoprene sleeve could improve knee proprioception relative to a no-stimulation/no-sleeve condition (c...

  7. Two-incision approach for video-assisted thoracoscopic sleeve lobectomy treating the central lung cancer

    Directory of Open Access Journals (Sweden)

    X Wang

    2014-01-01

    Full Text Available Background: We review our experiences with video-assisted thoracoscopic surgery (VATS sleeve lobectomy with bronchoplasty for nonsmall-cell lung cancer, using only two incisions. The aim of this study was to evaluate the technical feasibility and safety of surgical approach. Materials and Methods: From January 2013 to January 2014, we completed 15 cases of VATS sleeve lobectomy with bronchoplasty in our hospital. The patients underwent sleeve lobectomy with bronchoplasty at the following locations: right upper lobe (n = 4, right lower and middle lobes (n = 1, left lower lobe (n = 5, and left upper lobe (n = 6. The operation consisted of VATS anatomic sleeve lobectomy with bronchoplasty combined with systematic lymph node dissection, using only two incisions. Results: The patients underwent sleeve lobectomy with bronchoplasty were no postoperative complications. Median operative time was 183 min; median bronchial anastomosis time was 39 min; median blood loss was 170 ml. Pathological examination showed 12 squamous cell carcinomas and 3 adenocarcinoma. Median postoperative chest tube drainage duration was 4.5 days, and median hospital stay was 6.9 days. Conclusions: Video-assisted thoracoscopic surgery sleeve lobectomy with bronchoplasty is a feasible and safe surgical approach, using only two incisions. This way of operation can promote the development of surgical technology.

  8. Optimization of dual slot antenna using floating metallic sleeve for microwave ablation.

    Science.gov (United States)

    Ibitoye, Z A; Nwoye, E O; Aweda, M A; Oremosu, A A; Annunobi, C C; Akanmu, O N

    2015-04-01

    Backward heating reduction is vital in power distribution optimization in microwave thermal ablation. In this study, we optimized dual slot antenna to yield reduction in backward heating pattern along the antenna shaft with the application of floating metallic sleeve. Finite element methods were used to generate the electromagnetic (EM) field and thermal distribution in liver tissue. The position of the sleeve from the tip of the probe (z = 0 mm) was varied within the range 14 ≤ z ≤ 22 mm while sleeve length was varied within 16 ≤ z ≤ 48 mm at 2 mm interval using operating frequency of 2.45 GHz. The best optimized design has reflection coefficient of -20.87 dB and axial ratio of 0.41 when the sleeve position was at 17 mm and sleeve length was 18 mm. Experimental validation shows that inclusion of a floating metallic sleeve on dual slot antenna for hepatic microwave ablation averagely increased ablation diameter and aspect ratio by 17.8% and 33.9% respectively and decreased ablation length by 11.2%. Reduction in backward heating and increase in power deposition into liver tissue could be achieved by using this antenna to provide greater efficiency and localization of specific absorption rate in delivering microwave energy for hepatic ablation. PMID:25686672

  9. Investigation after one cycle on DOEL 3 tubes sleeved by Westinghouse

    International Nuclear Information System (INIS)

    At DOEL 3, 55 steam generator tubes cracked at the roll transition were repaired by Westinghouse in 1988 by CO2 laser welded sleeving, with post weld stress relieving. After one cycle, two sleeved tubes were pulled out for examination. The main purpose of this examination was the correlation with the on-site ultrasonic inspection performed after sleeving, because surface irregularities of the weld had interfered with the determination of weld penetration in the case of several sleeves. Good correlation between the ultrasonic results and the direct examination was found for the two tubes, which are both affected by surface irregularities on the majority of the circumference. Another important goal of the examination is the verification of the resistance to primary water stress corrosion cracking of the upper joint of the sleeve. After one year's service, no degradation was observed so that it was decided to keep all the other sleeves in service. This examination also shows the differences between the pulled-out tubes and the laboratory models examined beforehand, which highlights the problem of the reproducibility of such a process. (author)

  10. Petroleum hydrocarbon sparging from intact core sleeve samples

    International Nuclear Information System (INIS)

    The authors measured and modeled hydrocarbons vapor constituent sparging out of residually contaminated soil in two intact core sleeves from the US Coast Guard Air Station in northern Michigan. The LNAPL source was a 0.3 m thick zone of residual aviation gasoline in the contaminated capillary fringe about 5 m below the ground surface in uniform sandy soil. The sampling location was far downgradient of the origin of the fuel spill, so that the configuration of separate phase contamination was due to surface tension in the capillary fringe and trapping by a historically fluctuating water table. The gas sparging efficiency was assessed with a simple transport model balancing gaseous advection and a zero order source term. The predicted vertical profiles accurately matched the data for all constitutents, exhibiting source strengths that compared favorably with values from a companion study of diffusive soil venting. The sparging efficiency was found to be independent of gas flow rate, so that low flows generate relatively high exit concentrations. This finding suggests that local mass transport constrains the removal efficiency for LNAPL sources trapped by fluctuating water tables

  11. Sleeve lobectomy by video-assisted thoracic surgery versus thoracotomy for non-small cell lung cancer

    OpenAIRE

    Zhou, Shijie; Pei, Guotian; Han, Yi; Yu, Daping; SONG, XIAOYUN; Li, Yunsong; Xiao, Ning; Liu, Shuku; Liu, Zhidong; Xu, Shaofa

    2015-01-01

    Background Both video-assisted thoracic surgery (VATS) and thoracotomy are used for sleeve lobectomy for patients with non-small cell lung cancer (NSCLC). This retrospective study aimed to assess the safety and efficacy of VATS sleeve lobectomy for NSCLC patients. Methods Between May 2009 and May 2013, 51 sleeve lobectomies (10 by VATS and 41 by thoracotomy) were performed for patients with NSCLC. Operative characteristics and postoperative course were compared between two groups. Results Pat...

  12. Percutaneous Placement of Self-Expandable Metallic Stents in Patients with Obstructive Jaundice Secondary to Metastatic Gastric Cancer after Gastrectomy

    OpenAIRE

    Hong, Hyun Pyo; Seo, Tae-Seok; Cha, In-Ho; Yu, Jung Rim; Mok, Young Jae; Oh, Joo Hyeong; Kwon, Se Hwan; Kim, Sam Soo; Kim, Seung Kwon

    2013-01-01

    Objective To evaluate the outcomes of patients undergoing percutaneous placements of a biliary stent for obstructive jaundice secondary to metastatic gastric cancer after gastrectomy. Materials and Methods Fifty patients (mean age, 62.4 years; range, 27-86 years) who underwent percutaneous placements of a biliary stent for obstructive jaundice secondary to metastatic gastric cancer after gastrectomy were included. The technical success rate, clinical success rate, complication rate, stent pat...

  13. Morbidity and mortality after neoadjuvant therapy and sleeve lobectomyin N2-disease

    Directory of Open Access Journals (Sweden)

    Corinna LUDWIG

    2008-10-01

    Full Text Available Background and objective Sleeve resections were introduced to preserve lung function in patients with limited pulmonary reserve. Increasing experience with sleeve resection has reduced the rate of pneumonectomy below 10%. The aim of the study was to assess the outcome after neoadjuvant chemo- or chemoradiotherapy and sleeve resection in patients with N2 non-small cell lung cancer. Methods Retrospective analysis of 41 patient records between 01.01.2005 and 31.12.2007 underwent induction therapy in N2-disease followed by tracheobronchial sleeve resection. These patients were compared to the overall results after sleeve resection in our institution. Data analysed were; length of chest tube drainage in days, length of hospital stay, complications, morbidity and hospital mortality. Results In 178 patients, an anatomical bronchoplastic resection was performed. Preoperative chemotherapy in N2-disease (n =42 was given in 30 patients and radiochemotherapy in 11 patients. The length of the operation was between 94 min-493 min (average 143 min. Chest tubes were removed on average after 5 days. Patients were discharged after 10 days. R0-resection was possible in 90%. The overall complication rate was 27% (11/41. The rate of bronchial anastomotic leakage was 9.7%(4/41. Two patients with postoperative respiratory insufficiency and mechanical ventilation, 1 patient with technical failure required early correction of the suture and one patient with a necrosis of the anastomosis. 30-day hospital mortality rate was 2.4% (1/41. Conclusion Sleeve resection after neoadjuvant therapy has a higher local morbidity (anastomotic insufficiency 9.7% vs 2.8%. This may be explained by the quality of the surrounding tissue after neoadjuvant therapy, which compromises healing of the anastomosis. However, the results are comparable to those without induction therapy interms of radicality, and 30-d mortality rate (P >0.05. We therefore believe that sleeve resection after

  14. Morbidity and mortality after neoadjuvant therapy and sleeve lobectomyin N2-disease

    Institute of Scientific and Technical Information of China (English)

    Corinna LUDWIG; Walburga ENGEL-RIEDEL; Erich STOELBEN

    2008-01-01

    Background and objective Sleeve resections were introduced to preserve lung function in patients with limited pulmonary reserve. Increasing experience with sleeve resection has reduced the rate of pneumonectomy below 10%. The aim of the study was to assess the outcome after neoadjuvant chemo- or chemoradiotherapy and sleeve resection in patients with N2 non-small cell lung cancer. Methods Retrospective analysis of 41 patient records between 01.01.2005 and 31.12.2007 underwent induction therapy in N2-disease followed by tracheobronchial sleeve resection.These patients were compared to the overall results after sleeve resection in our institution. Data analysed were; length of chest tube drainage in days, length of hospital stay, complications, morbidity and hospital mortality. Results In 178 patients, an anatomical bronchoplastic resection was performed. Preoperative chemotherapy in N2-disease (n=42) was given in 30 patients and radiochemotherapy in 11 patients. The length of the operation was between 94 min-493 rain (average 143 min). Chest tubes were removed on average after 5 days. Patients were discharged after 10 days. RO-resection was possible in 90%. The overall complication rate was 27% (11/41). The rate of bronchial anastovaotic leakage was 9.7% (4/41). Two patients with postoperative respiratory, insufficiency and mechanical ventilation, 1 patient with technical failure required early correction of the suture and .ne patient with a necrosis of the anastomosis. 30-day hospital mortality rate was 2.4% (1/41). Conclusion Sleeve resection after neoadjuvant therapy has a higher local morbidity (anastomotic insufficiency 9.7% vs 2.8%). This may be explained by the quality of the surrounding tissue after neoadjuvant therapy,which compromises healing of the anastomosis. However, the results are comparable to those without induction therapy in terms of radicality, and 30-d mortality rate (P>O.05). We therefore believe that sleeve resection after neoadjuvant therapy

  15. Effects of total gastrectomy on plasma silicon and amino acid concentrations in men.

    Science.gov (United States)

    Tatara, Marcin R; Krupski, Witold; Szpetnar, Maria; Dąbrowski, Andrzej; Bury, Paweł; Szabelska, Anna; Charuta, Anna; Boguszewska-Czubara, Anna; Maciejewski, Ryszard; Wallner, Grzegorz

    2015-12-01

    The aim of the study was to determine one-year effects of total gastrectomy on plasma silicon and free amino acid concentrations in patients and evaluate changes of volumetric bone mineral density (vBMD) in lumbar spine. Eight patients were enrolled to the control (CTR) group. Six patients subjected to total gastrectomy (GX group) were included to the experimental group. vBMD in trabecular and cortical bone was measured in lumbar vertebrae at baseline (before surgery) and one year later using quantitative computed tomography. Plasma concentrations of silicon and free amino acids were determined at baseline and one year later using photometric method and ion-exchange chromatography. Body weights within CTR and GX groups were not different after one-year follow-up when compared to the baseline values (P > 0.05). An average annual decrease of vBMD in the trabecular bone in the gastrectomized patients reached 15.0% in lumbar spine and was significantly different in comparison to the percentage changes observed in CTR group (P = 0.02). One-year percentage change of vBMD in the cortical bone in L1 and L2 has shown significantly decreased values by 10.5 and 9.1% in the GX group when compared to the percentage change observed in the controls (P < 0.05). Plasma concentration of adipic acid was significantly higher by 101.6% one year after total gastrectomy procedure in the patients when compared to the baseline value (P = 0.01). Plasma concentration of silicon was significantly lowered by 26.7% one year after the total gastrectomy when compared to the baseline value (P = 0.009). Total gastrectomy in patients has induced severe osteoporotic changes in lumbar spine within one-year period. The observed osteoporotic changes were associated with decreased plasma concentration of silicon indicating importance of exocrine and endocrine functions of stomach for silicon homeostasis maintenance. Gastrectomy-induced bone loss was not related to decreased amino acid

  16. D2 dissection in laparoscopic and open gastrectomy for gastric cancer

    Institute of Scientific and Technical Information of China (English)

    Ming Cui; Jia-Di Xing; Wei Yang; Yi-Yuan Ma; Zhen-Dan Yao; Nan Zhang; Xiang-Qian Su

    2012-01-01

    AIM:To evaluate the radicalness and safety of laparoscopic D2 dissection for gastric cancer.METHODS:Clinicopathological data from 209 patients with gastric cancer,who underwent radical gastrectomy with D2 dissection between January 2007 and February 2011,were analyzed retrospectively.Among these patients,131 patients underwent laparoscopyassisted gastrectomy (LAG) and 78 underwent open gastrectomy (OG).The parameters analyzed included operative time,blood loss,blood transfusion,morbidity,mortality,the number of harvested lymph nodes (HLNs),and pathological stage.RESULTS:There were no significant differences in sex,age,types of radical resection [radical proximal gastrectomy (PG + D2),radical distal gastrectomy (DG + D2) and radical total gastrectomy (TG + D2)],and stages between the LAG and OG groups (P > 0.05).Among the two groups,127 cases (96.9%) and 76 cases (97.4%) had 15 or more HLNs,respectively.The average number of HLNs was 26.1 ± 11.4 in the LAG group and 24.2 ± 9.3 in the OG group (P =0.233).In the same type of radical resection,there were no significant differences in the number of HLNs between the two groups (PG + D2:21.7 ± 7.5 vs 22.4 4-9.3;DG + D2:25.7 ± 11.0 vs 22.3 ± 7.9; TG + D2:30.9 ± 13.4 vs 29.3 ± 10.4; P > 0.05 for all comparisons).Tumor free margins were obtained in all cases.Compared with OG group,the LAG group had significantly less blood loss,but a longer operation time (P < 0.001).The morbidity of the LAG group was 9.9%,which was not significantly different from the OG group (7.7%) (P=0.587).The mortality was zero in both groups.CONCLUSION:Laparoscopic D2 dissection is equivalent to OG in the number of HLNs,regardless of tumor location.Thus,this procedure can achieve the same radicalness as OG.

  17. The Meta-analysis:laparoscopy versus open distal gastrectomy for advanced gastric cancer

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    Objective:In this study, using meta-analysis, we compared the LADG with open distal gastrectomy (ODG) in the treatment of patients with advanced gastric cancer.Methods: The RevMan 5.0 software was used for the meta-analysis.Results:The meta-analysis indicated that in comparison with patients who underwent open distal gastrectomy, patients who were treated with LADG had shorter hospital stay, less analgesic requirements and blood loss, less overall complications, including intestinal obstruction, earlier time to liquid ingestion, and less wound infections. Nevertheless, there is no significant difference between LADG and ODG in anastomotic hemorrhage, anastomotic stenosis, duodenal stump leakage, tumor margin, lymph node dissection, mortality, pneumonia or reoperation. And in case of long-term survivals, both OS (overall-survival) and DFS (disease-free survival) showed no significant difference between LADG and ODG.Conclusion:LADG is feasible for the treatment of advanced gastric cancer, and provides several advantages.

  18. Anemia after gastrectomy for early gastric cancer:Long-term follow-up observational study

    Institute of Scientific and Technical Information of China (English)

    Chul-Hyun Lim; Sang Woo Kim; Won Chul Kim; Jin Soo Kim; Yu Kyung Cho; Jae Myung Park; In Seok Lee

    2012-01-01

    AIM:To identify the incidence and etiology of anemia after gastrectomy in patients with long-term follow-up after gastrectomy for early gastric cancer.METHODS:The medical records of those patients with early gastric adenocarcinoma who underwent curative gastrectomy between January 2006 and October 2007 were reviewed.Patients with anemia in the preoperative workup,cancer recurrence,undergoing systemic chemotherapy,with other medical conditions that can cause anemia,or treated during follow up with red cell transfusions or supplements for anemia were excluded.Anemia was defined by World Health Organization criteria (Hb < 12 g/dL in women and <13 g/dL in men).Iron deficiency was defined as serum ferritin < 20 μg/dL.Vitamin B12 deficiency was defined as serum vitamin B12 < 200 pg/mL.Iron deficiency anemia was defined as anemia with concomitant iron deficiency.Anemia from vitamin B12 deficiency was defined as megaloblastic anemia (mean cell volume >100 fL) with vitamin B12 deficiency.The profile of anemia over 48 mo of follow-up was analyzed.RESULTS:One hundred sixty-one patients with gastrectomy for early gastric cancer were analyzed.The incidence of anemia was 24.5% at 3 mo after surgery and increased up to 37.1% at 48 mo after surgery.The incidence of iron deficiency anemia increased during the follow up and became the major cause of anemia at 48 mo after surgery.Anemia of chronic disease and megaloblastic anemia were uncommon.The incidence of anemia in female patients was significantly higher than in male patients at 12 (40.0% vs 22.0%,P =0.033),24 (45.0% vs 25.0%,P =0.023),36 (55.0%vs 28.0%,P =0.004),and 48 mo (52.0% vs 31.0%,P =0.022) after surgery.Patients with total gastrectomy showed significantly higher incidence of anemia than patients with subtotal gastrectomy at 48 mo after surgery (60.7% vs 31.3%,P =0.008).The incidence of iron deficiency was significantly higher in female patients than in male patients at 6 (35.4% vs

  19. Percutaneous Trans-hepatic Obliteration for Bleeding Esophagojejunal Varices After Total Gastrectomy and Esophagojejunostomy

    International Nuclear Information System (INIS)

    A 72-year-old man who had undergone a total gastrectomy with a Roux-en-Y esophagojejunostomy for gastric cancer 6 years earlier presented to our hospital with massive hematemesis and melena. Endoscopic examination indicated esophageal varices with cherry-red spots and hemorrhage arising from beyond the anastomosis. Abdominal contrast-enhanced computed tomography and angiography revealed a dilated vein in the elevated jejunal limb supplying the varices. Percutaneous trans-hepatic obliteration (PTO) of the varices through the jejunal vein was performed using microcoils, ethanolamine oleate, and gelatin sponge cubes. Ten days after the procedure, endoscopic examination revealed reduction and thrombosis of the varices. We consider PTO to be an effective alternative method for treating ruptured esophagojejunal varices after total gastrectomy

  20. CT evaluation of bone mineral density (BMD) of lumbar spine in patients after gastrectomy

    International Nuclear Information System (INIS)

    The late postoperative complications in patients after gastrectomy include anemia and metabolic bone disorders. We studied to determine whether gastric surgery is associated with metabolic bone disease. Vertebral BMD was measured in 55 patients after gastric resection by using DEQCT (dual energy quantitative CT). Forty patients were symptomatic, having bone or joint pain, history of bone fracture, or dental caries. The control group consisted of 161 patients without metabolic bone disorders. Forty percent of the patients with either the symptoms or history of bone fracture or dental caries, and 20% of the patients without the symptoms or the history showed decreased BMD. BMD was significantly lower in males in their 60s and in females in their 50s and 70s than BMD in age-matched control groups. When male subjects were grouped according to the years following the operation (1-5, 6-10, 11-15, 16-20 years), BMD was found to be decreased in 27%, 29%, 40% and 50% of the patients in each group, respectively, and the degree of the decrease tended to be greater with increasing time after surgery. Higher incidence of decreased BMD was found in the patients after total gastrectomy when compared with those after subtotal gastrecotmy. Among the patients with subtotal gastrectomy, the incidence of decreased BMD was higher in patients with Billroth II anastomosis than in those with Billroth I anastomosis. In cases with compression fracture on thoracolumbar radiographs, BMD was significantly lower in comparison with cases with no fracture. It was difficult to differentiate between osteomalacia and osteoporosis only by the thoracolumbar radiographs. While the clinical information such as patients' complaints, histories of fracture and laboratory findings are important to evaluate the bone changes following gastric resection. BMD measurement is most useful in quantitatively determining the degree of bone loss after gastrectomy. (author)

  1. Anterograde jejunojejunal intussusception resulted in acute efferent loop syndrome after subtotal gastrectomy

    Institute of Scientific and Technical Information of China (English)

    Jung; Myun; Kwak; Jin; Kim; Sung; Ock; Suh

    2010-01-01

    Postoperative intussusception is an unusual clinical entity in adults,and is rarely encountered as a complication following gastric surgery.The most common type after gastric surgery is retrograde jejunogastric intussusception,and jejunojejunal intussusception has been rarely reported.We report a case of anterograde jejunojejunal intussusception after radical subtotal gastrectomy with Billroth Ⅱ anastomosis in a 38-year-old Korean woman with early gastric cancer,and include a review of the literature on thi...

  2. Traumatic Neuroma around the Celiac Trunk after Gastrectomy Mimicking a Nodal Metastasis: A Case Report

    OpenAIRE

    Kwon, Jung Hyeok; Ryu, Seung Wan; Kang, Yu Na

    2007-01-01

    Traumatic neuroma is a well-known disorder that occurs after trauma or surgery involving the peripheral nerve and develops from a nonneoplastic proliferation of the proximal end of a severed, partially transected, or injured nerve. We present a case of traumatic neuroma around the celiac trunk after gastrectomy in a 56-year-old man, which was confirmed by pathology. CT demonstrated the presence of a lobulated, homogeneous, hypoattenuating mass around the celiac trunk, mimicking a nodal metast...

  3. Gastric cancer surgery: Billroth I or Billroth II for distal gastrectomy?

    Directory of Open Access Journals (Sweden)

    Zhu Zheng-Gang

    2009-12-01

    Full Text Available Abstract Background The selection of an anastomosis method after a distal gastrectomy is a highly debatable topic; however, the available documentation lacks the necessary research based on a comparison of early postoperative complications. This study was conducted to investigate the difference of early postoperative complications between Billroth I and Billroth II types of anastomosis for distal gastrectomies. Methods A total of 809 patients who underwent distal gastrectomies for gastric cancer during four years were included in the study. The only study endpoint was analysis of in-patients' postoperative complications. The risk adjusted complication rate was compared by POSSUM (Physiological and operative severity score for enumeration of morbidity and mortality and the severity of complications was compared by Rui Jin Hospital classification of complication. Results Complication rate of Billroth II type of anastomosis was almost double of that in Billroth I (P = 0.000. Similarly, the risk adjusted complication rate was also higher in Billroth II group. More severe complications were observed and the postoperative duration was significantly longer in Billroth II type (P = 0.000. Overall expenditure was significantly higher in Billroth II type (P = 0.000. Conclusion Billroth II method of anastomosis was associated with higher rate of early postoperative complications. Therefore, we conclude that the Billroth I method should be the first choice after a distal gastrectomy as long as the anatomic and oncological environment of an individual patient allows us to perform it. However more prospective studies should be designed to compare the overall surgical outcomes of both anastomosis methods.

  4. Total laparoscopic subtotal gastrectomy with transvaginal specimen extraction is feasible in advanced gastric cancer

    Directory of Open Access Journals (Sweden)

    Fatih Sumer

    2015-01-01

    Conclusions: Transvaginal specimen extraction after laparoscopic gastric resection for advanced gastric cancer is a feasible procedure. It is offered to selected patients and of course only to female patients. Natural orifice surgery may provide faster recovery and decrease the wound related complications which may cause a delay on postoperative adjuvant chemo–radio therapies. We have presented, as far as we know, the first human case of a transvaginal extraction of an advanced gastric cancer after laparoscopic gastrectomy.

  5. Ectopic jejunal pacemakers and gastric emptying after Roux gastrectomy: Effect of intestinal pacing

    International Nuclear Information System (INIS)

    The aims of this study were to determine whether ectopic pacemakers are present after meals in the Roux limbs of dogs after vagotomy and Roux gastrectomy, whether these pacemakers slow gastric emptying of liquids or solids, and whether abolishing the pacemakers with electric pacing might speed any slow emptying that occurs. In six dogs that underwent vagotomy and Roux gastrectomy and in four dogs that underwent vagotomy and Billroth gastrectomy (controls), myoelectric activity of the Roux limb or duodenum was measured during gastric emptying of a 500 kcal mixed meal of 99mTc-labeled cooked egg and 111In-labeled milk. Roux dogs were tested with and without pacing of the Roux limb. Roux dogs showed ectopic pacemaker in the Roux limb that drove the pacesetter potentials of the limb in a reverse, or orad, direction during 57% of the postprandial recordings. Billroth dogs had no ectopic pacemakers (p less than 0.05). Liquids emptied more slowly in Roux dogs (half-life (t1/2) = 121 +/- 15 minutes) than in Billroth dogs (t1/2 = 43 +/- 9 minutes; p less than 0.05), but solids emptied similarly in both groups of dogs (t1/2 approximately 8 hours). Pacing the Roux limb abolished the ectopic pacemakers, restored the slow emptying of liquids to the more rapid rate found in the Billroth dogs (t1/2: paced Roux, 72 +/- 15 minutes; Billroth, 43 +/- 9 minutes; p greater than 0.05) and did not change emptying of solids. The conclusion was that ectopic pacemakers present in the Roux limb after vagotomy and Roux gastrectomy drove the limb in a reverse direction and slowed emptying of liquids after the operation. The defect was corrected by pacing the Roux limb in a forward direction

  6. Primary Squamous Cell Carcinoma of the Remnant Stomach after Subtotal Gastrectomy.

    Science.gov (United States)

    Chang, Yeon Soo; Kim, Min Sung; Kim, Dong Hee; Park, Seulkee; You, Ji Young; Han, Joon Kil; Kim, Seong Hwan; Lee, Ho Jung

    2016-06-01

    Primary squamous cell carcinoma (SCC) of the stomach is a very rare disease. However, the pathogenesis, clinical characteristics, and prognosis of gastric SCC are controversial and remain to be elucidated. Herein, we report a case of primary gastric SCC of the remnant stomach after subtotal gastrectomy. A 65-year-old man was admitted to our hospital due to epigastric discomfort and dizziness. He had undergone subtotal gastrectomy 40 years previously for gastric ulcer perforation. Endoscopy revealed a normal esophagus and a large mass in the remnant stomach. Abdominal computed tomography revealed enhanced wall thickening of the anastomotic site and suspected metachronous gastric cancer. Endoscopic biopsy revealed SCC. Total gastrectomy was performed with Roux-en-Y esophagojejunostomy. A 10-cm tumor was located at the remnant stomach just proximal to the previous area of anastomosis. Pathologic examination showed well-differentiated SCC extended into the subserosa without lymph node involvement (T3N0M0). The patient received adjuvant systemic chemotherapy with 6 cycles of 5-FU and cisplatin regimen, and he is still alive at the 54-month follow-up. According to the treatment principles of gastric cancer, early detection and radical surgical resection can improve the prognosis. PMID:27433399

  7. Complications after radical gastrectomy following FOLFOX7 neoadjuvant chemotherapy for gastric cancer

    Directory of Open Access Journals (Sweden)

    Ren Hui

    2011-09-01

    Full Text Available Abstract Background This study assessed the postoperative morbidity and mortality occurring in the first 30 days after radical gastrectomy by comparing gastric cancer patients who did or did not receive the FOLFOX7 regimen of neoadjuvant chemotherapy. Methods We completed a retrospective analysis of 377 patients after their radical gastrectomies were performed in our department between 2005 and 2009. Two groups of patients were studied: the SURG group received surgical treatment immediately after diagnosis; the NACT underwent surgery after 2-6 cycles of neoadjuvant chemotherapy. Results There were 267 patients in the SURG group and 110 patients in the NACT group. The NACT group had more proximal tumours (P = 0.000, more total/proximal gastrectomies (P = 0.000 and longer operative time (P = 0.005 than the SURG group. Morbidity was 10.0% in the NACT patients and 17.2% in the SURG patients (P = 0.075. There were two cases of postoperative death, both in the SURG group (P = 1.000. No changes in complications or mortality rate were observed between the SURG and NACT groups. Conclusion The FOLFOX7 neoadjuvant chemotherapy is not associated with increased postoperative morbidity, indicating that the FOLFOX7 neoadjuvant chemotherapy is a safe choice for the treatment of local advanced gastric cancer.

  8. The Application of FJI and Its Comparison with Different Alimentary Reconstructions after Total Gastrectomy for Cances

    Institute of Scientific and Technical Information of China (English)

    HAOXishan; LIQiang; 等

    2002-01-01

    Objective To investigate the optimum reconstruction after total gastrectomy for malignant disease,especially the necessity of gastric substitute and duodenal passage.Methods Among the 459 total gastrectomy cases,6 kinds of reconstructions had been used,including Braun,modified Braun I(mBraun I),modified Braun Ⅱ(mBraun Ⅱ),Roux-en-Y,“P jejunal interposition(PJI)and functional jejunal interposition(FJI).Postoperative complains,body weight,food intake,serum nutritional paraments,complete blood cout,half-emptying time of the gastric substitute,PNI,Visick index were evaluated one year after r surgery.Results As compared with Braun group,the mBraun I,Ⅱ and Roux-en-Y groups which had some kinds of gastric substitute showed less reflux esophagitis and higher serum total protein(P<0.01).As compared with mBraun I,Ⅱ,Roux-en-Y,PJI and FJI groups which had duodenal passage showed better body weight,higher nutritional paraments and PNI(P<0.05).Conclusion It is essential to construct a gastric substitute and maintain the food chyme flowing through the duodenum after total gastrectomy,and the FJI is a better choice in this study.

  9. Comparative evaluation of two reconstructive methods following laparoscopic assisted subtotal gastrectomy in dogs

    Directory of Open Access Journals (Sweden)

    Bakhtiari Jalal

    2012-12-01

    Full Text Available Abstract Background Laparoscopic gastrectomy is a new and technically challenging surgical procedure with potential benefit. The objective of this study was to investigate clinical and para-clinical consequences following Roux-en-Y and Jejunal Loop interposition reconstructive techniques for subtotal gastrectomy using laparoscopic assisted surgery. Results Following resection of the stomach attachments through a laparoscopic approach, stomach was removed and reconstruction was performed with either standard Roux-en-Y (n = 5 or Jejunal Loop interposition (n = 5 methods. Weight changes were monitored on a daily basis and blood samples were collected on Days 0, 7 and 21 post surgery. A fecal sample was collected on Day 28 after surgery to evaluate fat content. One month post surgery, positive contrast radiography was conducted at 5, 10, 20, 40, 60 and 90 minutes after oral administration of barium sulfate, to evaluate the postoperative complications. There was a gradual decline in body weight in both experimental groups after surgery (P  0.05. Fecal fat content increased in the Roux-en-Y compared to the Jejunal loop interposition technique (P  0.05. Conclusion Roux-en-Y and Jejunal loop interposition techniques might be considered as suitable approaches for reconstructing gastro-intestinal tract following gastrectomy in dogs. The results of this study warrant further investigation with a larger number of animals.

  10. Successful enteral nutrition in the treatment of esophagojejunal fistula after total gastrectomy in gastric cancer patients

    Directory of Open Access Journals (Sweden)

    Portanova Michel

    2010-08-01

    Full Text Available Abstract Background Esophagojejunal fistula is a serious complication after total gastrectomy in gastric cancer patients. This study describes the successful conservative management in 3 gastric cancer patients with esophagojejunal fistula after total gastrectomy using total enteral nutrition. Methods Between January 2004 to December 2008, 588 consecutive patients with a proven diagnosis of gastric cancer were taken to the operation room to try a curative treatment. Of these, 173 underwent total gastrectomy, 9 of them had esophagojejunal fistula (5.2%. In three selected patients a trans-anastomotic naso-enteral feeding tube was placed under fluoroscopic vision when the fistula was clinically detected and a complete polymeric enteral formula was used. Results The complete closing of the esophagojejunal fistula was obtained in day 8, 14 and 25 respectively. Conclusion In some selected cases it is possible to make a successful enteral nutrition using a feeding tube distal to the leak area inserted with the help of fluoroscopic vision. The specialized management of a gastric surgery unit and nutritional therapy unit are highlighted.

  11. Theoretical Vibration Analysis Regarding Excitation due to Elliptical Shaft Journals in Sleeve Bearings of Electrical Motors

    Directory of Open Access Journals (Sweden)

    Ulrich Werner

    2012-01-01

    Full Text Available This paper shows a theoretical vibration analysis regarding excitation due to elliptical shaft journals in sleeve bearings of electrical motors, based on a simplified rotordynamic model. It is shown that elliptical shaft journals lead to kinematic constraints regarding the movement of the shaft journals on the oil film of the sleeve bearings and therefore to an excitation of the rotordynamic system. The solution of the linear differential equation system leads to the mathematical description of the movement of the rotor mass, the shaft journals, and the sleeve bearing housings. Additionally the relative movements between the shaft journals and the bearing housings are deduced, as well as the bearing housing vibration velocities. The presented simplified rotordynamic model can also be applied to rotating machines, other than electrical machines. In this case, only the electromagnetic spring value cm has to be put to zero.

  12. Surgical outcomes of 2041 consecutive laparoscopic gastrectomy procedures for gastric cancer: a large-scale case control study.

    Directory of Open Access Journals (Sweden)

    Jian-Xian Lin

    Full Text Available BACKGROUND: Laparoscopic gastrectomy (LG for gastric cancer has increased in popularity due to advances in surgical techniques. The aim of this study is to validate the efficacy and safety of laparoscopic gastrectomy for gastric cancer compared with open gastrectomy (OG. METHODS: The study comprised 3,580 patients who were treated with curative intent either by laparoscopic gastrectomy (2,041 patients or open gastrectomy (1,539 patents between January 2005 and October 2013. The surgical outcomes were compared between the two groups. RESULTS: Laparoscopic gastrectomy was associated with significantly less blood loss, transfused patient number, time to ground activities, and post-operative hospital stay, but with similar operation time, time to first flatus, and time to resumption of diet, compared with the open gastrectomy. No significant difference in the number of lymph nodes dissected was observed between these two groups. The morbidity and mortality rates of the LG group were comparable to those of the OG group (13.6% vs. 14.4%, P = 0.526, and 0.3% vs. 0.2%, P = 0.740. The 3-year disease-free and overall survival rates between the two groups were statistically significant (P<0.05. According to the UICC TNM classification of gastric cancer, the 3-year disease-free and overall survival rates were not statistically different at each stage. CONCLUSIONS: Our single-center study of a large patient series revealed that LG for gastric cancer yields comparable surgical outcomes. This result was also true of local advanced gastric cancer (AGC. A well-designed randomized controlled trial comparing surgical outcomes between LG and OG in a larger number of patients for AGC can be carried out.

  13. Robotic-assisted thoracoscopic sleeve lobectomy for locally advanced lung cancer

    Science.gov (United States)

    Lin, Mong-Wei; Kuo, Shuenn-Wen; Yang, Shun-Mao

    2016-01-01

    Background The Da Vinci robotic system has been used to enhance the surgeon’s visualization and agility in lung cancer surgery, and thus facilitate refined dissection, knot tying and suturing. However, only a few case reports exist on performing a sleeve lobectomy with a robotic-assisted thoracoscopic surgery (RATS) technique. Here we describe our early experience performing RATS sleeve lobectomies. To our knowledge, this is the first study reporting a series of RATS sleeve lobectomies. Methods The six consecutive NSCLC patients who underwent a RATS sleeve lobectomy between November 2013 and July 2015 at the National Taiwan University Hospital were enrolled in this study. The lobectomies were all performed by the same surgeon using a three-arm robotic system with an additional utility incision made for assistance and specimen retrieval. Results Five patients were diagnosed with squamous cell carcinoma, while the sixth was diagnosed with a carcinoid tumor. The mean operation time was 436.7 [255–745] minutes. The mean postoperative intensive care unit (ICU) stay and hospital stay were 3.7 [1–11] and 11.3 [3–26] days, respectively. Two (33.3%; 2/6) morbidities were noted, including one pneumonia and one anastomosis stricture. There were no cases of mortality or of conversion to thoracotomy. Conclusions Our experience performing a RATS sleeve lobectomy in the six patients demonstrated the feasibility of RATS in complex lung cancer surgeries. The three-dimensional vision and articulated joint instruments made robotic-assisted bronchial anastomosis easier under the endoscopic setting. Our experience suggests that RATS offers specific advantages with regard to accuracy and safety when performing sleeve lobectomies. PMID:27499965

  14. Remote welding device for sleeve in a tube of nuclear power plant steam generator

    International Nuclear Information System (INIS)

    For welding an inner sleeve round the defective area of a steam generator tube, an optical fiber carries a YAG laser beam to an optical cell which focuses the beam onto the sleeve, the optical cell turning about the fiber which can slide axially. The welding beam is focused using a control beam from a helium-neon laser which is also injected into the optical fiber and its return intensity measured and then optimized by displacing the optical fiber axially with respect to the optical cell

  15. Process and device for extracting a blocking sleeve of a PWR assembly with removable guide tubes

    International Nuclear Information System (INIS)

    An annular hydraulic actuator is used to move the fingers of a damp to grip the sleeve. The body of the actuator is attached to a long rod. A piston moving in the direction of the rods axis has a tronconical part shaped to correspond to the external surface of the upper part of the damp's fingers. The piston moves in a way by the action of a pressurized fluid feeding its chamber and in the opposite way by springs. An assembly of these devices can be used to extract many sleeves simultaneously

  16. Outcome after gastrectomy in gastric cancer patients with type 2 diabetes

    Institute of Scientific and Technical Information of China (English)

    Jong Won Kim; Jae-Ho Cheong; Woo Jin Hyung; Seung-Ho Choi; Sung Hoon Noh

    2012-01-01

    AIM: To evaluate the prognosis of type Ⅱ diabetes mellitus (T2DM) after gastrectomy and related factors in gastric cancer patients. METHODS: 403 gastric cancer patients with T2DM were studied, who underwent gastrectomy between May 2003 and September 2009. A review of medical records and telephone interviews was performed in this cross-sectional study. The factors included in the statistical analysis were as follows: gender, age, type of surgery, preoperative body mass index (BMI), current BMI, BMI reduction ratio, preoperative insulin or oral diabetic medicine requirement, follow-up duration, and current state of diabetes. Assessment of diabetes status after surgery was classified into four categories according to the change in hypoglycemic agents after surgery and present status of T2DM: resolution, improvement, same, and worse. RESULTS: The mean follow-up duration was 33.7 mo (± 20.6 mo), preoperative BMI was 24.7 kg/m2 (± 3.0 kg/m2), and BMI reduction ratio was 9.8% (± 8.6%). After surgery, T2DM was cured in 58 patients (15.1%) and was improved in 117 patients (30.4%). According to the type of surgery, the BMI reduction ratio was significantly higher in the total gastrectomy and Roux-en-Y reconstruction group [14.2% ± 9.2% vs 9.2% ± 7.7% (Billroth Ⅱ group), P < 0.001] and significantly lower in the subtotal gastrectomy and Billroth Ⅰ reconstruction group [7.6% ± 8.0%, 9.2% ± 7.7% (Billroth Ⅱ group), P < 0.001]. The BMI reduction ratio, follow-up duration after surgery, type of surgery, extent of gastrectomy, and performance of duodenal bypass were significantly correlated to the course of T2DM (P < 0.05). The BMI reduction ratio was the most influential factor on T2DM status. In a subgroup analysis of patients with a BMI reduction ratio of 10% or less (n = 206), T2DM was cured in 15 (7.6%) patients and was improved in 57 (28.8%) patients after surgery, and only the duration of surgery was significantly correlated to T2DM status (P = 0

  17. Analysis of risk factors for the interval time, number and pattern of hepatic metastases from gastric cancer after radical gastrectomy

    Institute of Scientific and Technical Information of China (English)

    Jing-Yu Deng; Han Liang; Dan Sun; Hong-Jie Zhan; Ru-Peng Zhang

    2008-01-01

    AIM: To analyze the risk factors for interval time,number and pattern of hepatic metastases from gastric cancer after radical gastrectomy, and provide evidence for predicting and preventing hepatic metastasis from gastric cancer after radical gastrectomy. METHODS: A retrospective study of 87 patients with hepatic metastasis who underwent radical gastrectomy for gastric cancer from 1996 to 2001. The data was analyzed to evaluate significant risk factors for interval time, number and pattern of hepatic metastases originating from gastric cancer after radical gastrectomy.RESULTS: The size of gastric cancer and lymph node metastases were independently correlated with the interval time of hepatic metastases; the depth of invasion was independently correlated with the number of hepatic metastases; while the depth of invasion and Lauren classification were independently correlated with the pattern of hepatic metastases.CONCLUSION: We evaluated the interval time of hepatic metastases with the size of gastric cancer and lymph node metastases. The depth of invasion could be used to evaluate the number of hepatic metastases, while the depth of invasion and the Lauren classification could be used to evaluate the pattern of hepatic metastases in patients who underwent radical gastrectomy.

  18. Nerve root sleeve diameters at normal segments and at segments with proximate disc disease: MRI evaluation

    International Nuclear Information System (INIS)

    Abstract Objective. To compare MR morphologic parameters of spinal nerve roots and their range of variability in normal and abnormal spinal segments.Design and patients. Ninety-six consecutive lumbar spine MRI examinations were segregated into three groups: group 1 was composed of 30 patients with disc bulge, protrusion or extrusion at the L5-S1 segment measuring 3 mm or more; group 2 consisted of 31 patients with no disc pathology; and group 3 was composed of 35 patients with no disc abnormality at the L5-S1 level but with coexisting spine pathology at other segments. Measurements of 192 S1 nerve root sleeves were performed at three consecutive levels on T1-weighted images. Differences between right and left nerve root sleeve diameters (delta value) at three slice levels were calculated in each group. Data were analyzed by ANOVA.Results. No significant differences between the mean values of traversing S1 nerve root sleeve diameter on three corresponding consecutive slices were found among groups (P=0.733, P=0.824, P=0.365 respectively), nor were significant differences in delta values between groups found (P=0.639, P=0.113, P=0.722).Conclusions. S1 nerve root sleeve diameter and the differences between right and left in the abnormal group were not significantly different from normal and therefore can not be used as an objective criterion of nerve root pathology. (orig.)

  19. Study of insulator sleeve and ceiling effect in Mather type plasma focus

    International Nuclear Information System (INIS)

    Neutron emission from a small Mather-type Plasma Focus facility is studied. Specifically, the effects of insulator sleeve length and a ''ceiling'' introduced in front of the central electrode on the neutron yield and on the fluence anisotropy are investigated. 3 refs, 5 figs

  20. Effect of insulator sleeve length on neutron emission in a plasma focus

    International Nuclear Information System (INIS)

    Neutron emission from a small Mather-type plasma focus facility operated by a single 32 μF, 15 kV capacitor is studied. Specifically, the effects of insulator sleeve length and a ''ceiling'' introduced in front of the central electrode on the neutron yield and on the fluence anisotropy are investigated. (orig.)

  1. Concept for sleeve induction motor with 1-msec mechanical time constant

    Science.gov (United States)

    Wiegand, D. E.

    1968-01-01

    Conductive sleeve induction motor having a 1-msec mechanical time constant is used with solid-state devices to control all-electric servo power systems. The servomotor rotor inertia is small compared to the maximum force rating of the servo motion, permitting high no-load acceleration.

  2. Duodenal-jejunal bypass sleeve - a potential alternative to bariatric surgery?

    DEFF Research Database (Denmark)

    Rohde, Ulrich; Gylvin, Silas; Vilmann, Peter;

    2014-01-01

    Overweight and obesity are risk factors for several co-morbidities reducing life expectancy. Conservative treatment of obesity is generally ineffective in the long-term. Bariatric surgery has proven effective, but is associated with potential complications. Duodenal-jejunal bypass sleeve is a novel...

  3. The Single Needle Lockstitch Machine. [Constructing and Setting Sleeves.] Module 7.

    Science.gov (United States)

    South Carolina State Dept. of Education, Columbia. Office of Vocational Education.

    This module on constructing and setting sleeves, one in a series on the single needle lockstitch sewing machine for student self-study, contains two sections. Each section includes the following parts: an introduction, directions, an objective, learning activities, student information, student self-check, check-out activities, and an instructor's…

  4. Endoscopic sleeve gastroplasty (the Apollo method: a new approach to obesity management

    Directory of Open Access Journals (Sweden)

    Gontrand López-Nava-Breviere

    2016-04-01

    Full Text Available Background: Many obese patients cannot lose weight or reject conventional obesity management. Endoscopic sleeve gastroplasty (the Apollo method is a pioneering coadjuvant, interventionist technique for the integral management of obesity. Objectives: The goals of this study were to report safety and efficacy results obtained at 6 months in patients undergoing endoscopic sleeve gastroplasty. Material and methods: A prospective study was performed in 55 patients (13 males, 42 females who were subjected to the Apollo technique; mean age was 43.5 years (range 25-60 and mean BMI was 37.7 kg/m² (range 30-48. All received multidisciplinary follow-up for weight loss. Weight changes and presence of complications were assessed. Through the endoscope a triangular pattern suture is performed consisting of approximately 3-6 transmural (mucosa to serosa stitches, using a cinch device to bring them nearer and form a plication. Results: A total of 6-8 plications are used to provide a tubular or sleeve-shaped restriction to the gastric cavity. No major complications developed and patients were discharged at 24 hours following the procedure. Endoscopic and radiographic follow-up at 6 months post-procedure showed a well preserved tubular form to the stomach. After 6 months patients had lost 18.9 kg and 55.3% of excess weight. Conclusions: Endoscopic sleeve gastroplasty, together with dietary and psycho-behavioral changes, is a safe, effective technique in the coadjuvant management of obese patients.

  5. Laparoscopy-assisted gastrectomy with D2 lymph node dissection for advanced gastric cancer without serosa invasion: a matched cohort study from South China

    Directory of Open Access Journals (Sweden)

    Lin Jian-Xian

    2013-01-01

    Full Text Available Abstract Background Gastric cancer is a common malignancy worldwide and a common cause of death from cancer. Despite recent advances in multimodality treatment and targeted therapy, complete resection remains the only treatment that can lead to cure. This study was devised to investigate the technical feasibility, safety and oncologic efficacy of laparoscopy-assisted gastrectomy for advanced gastric cancer without serosa invasion. Methods A retrospective matched cohort study was performed in south China comparing laparoscopy-assisted gastrectomy and open gastrectomy for advanced gastric cancer without serosa invasion. Eighty-three patients with advanced gastric cancer undergoing laparoscopy-assisted gastrectomy between January 2008 and December 2010 were enrolled. These patients were compared with 83 patients with advanced gastric cancer undergoing open gastrectomy during the same period. Results There was no significant difference in clinicopathologic characteristics between the two groups. Regarding perioperative characteristics, the operation time and time to ground activities did not differ between the two groups, whereas the blood loss, transfused patient number, time to first flatus, time to resumption of diet, and postoperative hospital stay were significantly less in laparoscopy-assisted gastrectomy than in open gastrectomy (P Conclusion Laparoscopy-assisted gastrectomy with D2 lymphadenectomy is a safe and feasible procedure for advanced gastric cancer without serosa invasion. To be accepted as a choice treatment for advanced gastric cancer, well-designed randomized controlled trials comparing short-term and long-term outcomes between laparoscopy-assisted gastrectomy and open gastrectomy in a larger number of patients are necessary.

  6. Laparoscopy-Assisted Total Gastrectomy with D2 Lymphadenectomy and Roux-En-Y Reconstruction - Case Report

    Directory of Open Access Journals (Sweden)

    Papaj Piotr

    2015-03-01

    Full Text Available We report a case of patient with stage IIIb gastric cancer qualified for laparoscopy - assisted gastrectomy and our first impressions about this procedure. Total gastrectomy with complete omentectomy and extended lymphadenectomy (D2 was performed laparoscopically. The intestinal continuity was restored in a Roux-en-Y mode extracorporeally through the abdominal access system. The orogastric tube with anvil of the circular stapler was transorally introduced into the esophagus. Subsequently, intracorporeal stapling esophagojejunostomy was performed. There were no complications after the operation and the patient was discharged in good shape. Oncological radicality was sufficient and patient has undergone chemotherapy treatment.

  7. Rabeprazole is effective for bile reflux oesophagitis after total gastrectomy in a rat model

    Institute of Scientific and Technical Information of China (English)

    Naoki; Hashimoto

    2015-01-01

    AIM:To elucidate the effect of a proton pump inhibitor(PPI,rabeparazole)on oesophageal bile reflux in oesophagitis after total gastrectomy.METHODS:Twenty-one 8-week-old male Wistar rats were studied.They were performed oesophagoduodenostomy of total gastrectomy to induce oesophageal reflux of biliary and pancreatic juice.Five rats were performed the sham operation(Sham).On post-operative day 7,they were treated with saline(Control)(n=8)or PPI(rabeprazole,30 mg/kg per day,ip)(n=8)for 2 wk.On post-operative 21,all rats were sacrificed and each oesophagus was evaluated histologically.Oesophageal injury was evaluated by macroscopic and microscopic findings as well as the expression of cyclooxygenase-2(COX2).We measured bile acid in the oesophageal lumen and the common bile duct.RESULTS:At 3 wk after surgery,a histological study analysis revealed an increase in the thickness of the epithelium,elongation of the lamina propria and basal cell hyperplasia in the oesophageal mucosa.The macroscopic ulcer score and microscopic ulcer length of the control group were significantly higher compared to those of the rabeprazole-treated group.The expression of COX2 was significantly increased according to the immunostaining in the control group compared to rabeprazole-treated group.Although there was no difference between the control and PPI groups in the total bile acid in the common bile duct,the bileacid activity in the oesophageal lumen was significantly decreased in the rabeprazole-treated group due to augmentation of the duodenal motor complex.CONCLUSION:With this model,rabeprazole is good effect for reflux esophagitis after total gastrectomy from bile reflux.Bile acid is an important factor in the mucosal lesion induced by duodenal reflux.

  8. Evaluation of POSSUM scoring system in patients with gastric cancer undergoing D2-gastrectomy

    Directory of Open Access Journals (Sweden)

    Monig Stefan P

    2005-04-01

    Full Text Available Abstract Background Risk adjustment and stratification play an important role in quality assurance and in clinical research. The Physiological and Operative Severity Score for the enUmeration of Mortality and morbidity (POSSUM is a patient risk prediction model based on 12 patient characteristics and 6 characteristics of the surgery performed. However, because the POSSUM was developed for quality assessment in general surgical units, its performance within specific subgroups still requires evaluation. The aim of the present study was to assess the accuracy of POSSUM in predicting mortality and morbidity in patients with gastric cancer undergoing D2-gastrectomy. Methods 137 patients with gastric cancer undergoing gastrectomy were included in this study. Detailed, standardized risk assessments and thorough documentation of the post-operative courses were performed prospectively, and the POSSUM scores were then calculated. Results The 30- and 90- day mortality rates were 3.6% (n = 5 and 5.8% (n = 8, respectively. 65.7% (n = 90 of patients had normal postoperative courses without major complications, 14.6% (n = 20 had moderate and 13.9% (n = 19 had severe complications. The number of mortalities predicted by the POSSUM-Mortality Risk Score (R1 was double the actual number of mortalities occurring in the median and high-risk groups, and was more than eight times the actual number of mortalities occurring in the low-risk group (R1 p Conclusion The POSSUM Score may be beneficial and can be used for assessment of the peri- and post-operative courses of patients with gastric carcinoma undergoing D2-gastrectomy. However, none of the scores examined here are useful for preoperative prediction of postoperative course.

  9. Influence of Delayed Gastric Emptying in Radiotherapy after a Subtotal Gastrectomy

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Dong Hyun; Kim, Won Taek; Lee, Mi Ran; Ki, Yong Gan; Nam, Ji Ho; Park, Dal; Jeon, Ho Sang; Jeon, Kye Rok; Kim, Dong Won [Pusan National University of Medicine, Busan (Korea, Republic of)

    2009-12-15

    This aim of this study was to evaluate changes in gastric volume and organ position as a result of delayed gastric emptying after a subtotal gastrectomy performed as part of the treatment of stomach cancer. The medical records of 32 patients who underwent concurrent chemoradiotherapy after a subtotal gastrectomy from March 2005 to December 2008 were reviewed. Of these, 5 patients that had more than 50 cc of residual gastric food detected at computed tomography (CT) simulation, were retrospectively enrolled in this study. Gastric volume and organ location was measured from CT images obtained before radiotherapy, twice weekly. In addition, authors evaluated the change of radiation dose distribution to planning the target volume and normal organ in a constant radiation therapy plan regardless of gastric volume variation. A variation in the gastric volume was observed during the radiotherapy period (64.2{approx}340.8 cc; mean, 188.2 cc). According to the change in gastric volume, the location of the left kidney was shifted up to 0.7 - 2.2 cm (mean, 1.2 cm) in the z-axis. Under-dose to planning target volume (V43, 79.5{+-}10.4%) and over-dose to left kidney (V20, 34.1{+-}12.1%; Mean dose, 23.5{+-}8.3 Gy) was expected, given that gastric volume change due to delayed gastric emptying wasn't taken into account. This study has shown that a great change in gastric volume and left kidney location may occur during the radiation therapy period following a subtotal gastrectomy, as a result of delayed gastric emptying. Detection of patients who experienced delayed gastric emptying and the application of gastric volume variation to radiation therapy planning will be very important.

  10. Anticorrosive field joint coating qualification, heat shrinkable sleeve; Qualificacao de revestimento anticorrosivo para juntas de campo, mantas termocontrateis

    Energy Technology Data Exchange (ETDEWEB)

    Cabral, Glaucia B.; Koebsch, Andre; Castinheiras Junior, Wilson [PETROBRAS, Rio de Janeiro, RJ (Brazil)

    2005-07-01

    The main objective of this job is to present the quality requirements fixed by PETROBRAS for anticorrosive field joint coating for buried pipelines, industrially coated with PE-3L. It describes the used system - polyethylene based heat shrinkable sleeve - comparing with the existent on the pipeline. So, it exposes the suppliers' qualification stages, which include test carried out for the materials, for the sleeve set and for the coating after its application on the joint field. Finally, it shows that the experience, which has been gotten in the qualification, consolidated the quality control systematic that have been carry out during the sleeves acquisition and application at the pipeline construction. (author)

  11. Hereditary diffuse gastric cancer: genetics, prophylactic total gastrectomy, and follow up

    Directory of Open Access Journals (Sweden)

    Shenoy S

    2011-04-01

    Full Text Available Santosh Shenoy1, Carl Palmer2, Teresa Dunsworth3, Stephen McNatt41Department of Surgery, Louis A Johnson VA Medical Center, Clarksburg, WV, USA; 2Department of Medicine, West Virginia University, General Internal Medicine and Geriatrics, Morgantown, WV, USA; 3General Internal Medicine and Geriatrics, West Virginia University, Morgantown, WV, USA; 4Department of Surgery, Wake Forest University Baptist Medical Center, Winston-Salem, NC, USABackground: Germline truncating mutations in the E-cadherin (CDH1 gene have been identified in families with hereditary diffuse gastric cancer (HDGC and lobular breast cancers. This disease entity has an autosomal dominant pattern of inheritance with approximately 70% to 80% penetrance. Currently there is no definitive diagnostic modality for surveillance to detect this form of gastric cancer (GC which carries a poor prognosis and high mortality. Prophylactic total gastrectomy is an option in the affected carriers and may offer improved long term survival for HDGC.Methods: Two siblings from a single family with multi generation history of GC were identified as carriers of the mutation. After genetic counseling, they underwent laparoscopic prophylactic total gastrectomy with Roux-en-y esophagojejunostomy reconstruction. We describe the demographics and pedigree analysis, and postoperative and 5-year outcomes, and review the literature.Results: Pathologic examination of the stomach revealed no foci of cancer in Patient 1; evidence of foci of gastric cancer was noted in Patient 2. Patient 2 subsequently developed lobular carcinoma of breast and underwent prophylactic bilateral mastectomy. No metastatic disease has been noted at 5-year follow up. She also had a successful pregnancy and birth of a healthy baby 3 years post gastrectomy. Both patients had a 30 to 40 lbs (13.5 to 18 kg permanent weight loss. Both patients have maintained their preoperative activities and occupations.Conclusion: HDGC is an uncommon

  12. Ghrelin and gastrin in advanced gastric cancer before and after gastrectomy

    Institute of Scientific and Technical Information of China (English)

    Anna Zub-Pokrowiecka; Kazimierz Rembiasz; Peter C Konturek; Andrzej Budzyński; Stanis(l)aw J Konturek; Marek Winiarski; W(l)adys(l)aw Bielański

    2011-01-01

    AIM: To investigate plasma ghrelin, gastrin and growth hormone secretagogue receptor (GHS-R) expression in advanced gastric cancer (GC) before and after resection. METHODS: Seventy subjects in whom endoscopy of the upper gastrointestinal tract was performed in the Department of General Surgery at Cracow University during the past decade: (1) 25 patients with GC associated with Helicobacter pylori (H. pylori ) infection; (2) 10 patients with GC 4-5 years after (total or subtotal) gastrectomy; (3) 25 healthy H. pylori -negative controls, matched by age and BMI to the above two groups; and (4) 10 GC patients 4-5 years after total gastrectomy. Ghrelin and gastrin plasma concentrations were measured by specific radioimmunoassay under fasting conditions and postprandially at 60 and 90 min after ingestion of a mixed meal. GHS-R expression was examined in biopsy samples from intact healthy mucosa and GC tissue using semi-quantitative reverse transcriptionpolymerase chain reaction. RESULTS: In healthy controls, fasting plasma ghrelin levels were significantly elevated and declined markedly at 60 and 90 min after a mixed meal. The concomitant enhanced ghrelin, GHS-R and gastrin expression in GC tissue over that recorded in intact mucosa, and the marked rise in plasma gastrin in these subjects under fasting conditions indicate the role of these hormonal factors in GC formation. Fasting plasma levels and postprandial response of ghrelin and gastrin appear to be inversely correlated in healthy subjects. Feeding in the controls resulted in a significant fall in plasma ghrelin with a subsequent rise in plasma gastrin, but in H. pylori -positive GC patients submitted to total or distal gastrectomy, feeding failed to affect significantly the fall in plasma ghrelin that was recorded in these patients before surgery. Fasting ghrelin concentrations were significantly lower in patients 4-5 years after total gastrectomy compared to those in healthy controls and to these in GC patients

  13. A calculation on the diffusion and release behavior of fission products in the first and second OGL-1 fuel sleeves

    International Nuclear Information System (INIS)

    Based on the Fick's law the computer program FPDR has been developed to calculate the one-dimensional diffusion and release behavior of fission products in the graphite sleeves of the first and second OGL-1 fuel assembly. Through the comparison between the measured and calculated penetration profiles, the diffusion coefficient of 90Sr in the first fuel sleeve has been estimated to be (2 -- 5) x 10-13 m2/s; those of 137Cs and 90Sr in the second fuel sleeve around or larger than 1 x 10-12 m2/s, and --10-14 m2/s, respectively. The release of 90Sr from the second fuel sleeve is negligible; that of 137Cs depends linearly on its diffusion coefficient if the coefficient is larger than 10-12 m2/s, but practically does not depend on its evaporation parameter. (author)

  14. [A Case of Gastritis Cystica Polyposa That Developed Early after Distal Gastrectomy].

    Science.gov (United States)

    Koizumi, Noriaki; Kobayashi, Hiroki; Takagi, Tsuyoshi; Fukumoto, Kanehisa

    2015-11-01

    We present a case of gastritis cystica polyposa (GCP) that developed early after laparoscopy-assisted distal gastrectomy with BillrothⅠreconstruction. GCP is a chronic inflammatory gastric mucosal lesion that emerges at an anastomotic site usually after a long post-gastrectomy period, which is mainly caused by constant chemical stimulation by duodenal juice. In addition, chronic mechanical stimulation caused by reflux or stasis of gastrointestinal contents may also trigger GCP. Surgeons should ensure a functional and physiologically patent anastomosis during surgery. Hypergastrinemia, caused by persistent Helicobacter pylori infection or continuing administration of proton pump inhibitors, may also contribute to the development of GCP, as GCP is a type of hyperplastic polyp. Therefore, appropriate postoperative follow-up, including pylorus eradication and avoidance of unnecessary administration of proton pump inhibitors, seems to be needed in order to prevent the development of GCP. In our case, many factors exhibited the multiplier effect, resulting in early development of GCP. As GCP also attracts much attention as a precancerous lesion, appropriate prevention and prompt treatment are required. PMID:26805252

  15. High prevalence of osteoporosis in patients with gastric adenocarcinoma following gastrectomy

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    AIM: To evaluate the prevalence and predictive factors of osteoporosis in patients with gastric adenocarcinoma after gastrectomy.METHODS: The study included 133 patients diagnosed with gastric adenocarcinoma but who did not undergo prior diagnostic work-up for osteoporosis. Bone mineral density (BMD) was measured by dual-energy X-ray absorptiometry (DXA) and vertebral deformity was assessed by plain X-rays. We evaluated the effects of age, sex, body mass index (BMI), anemia, back pain,vertebral deformity, tumor staging, reconstruction type,and past medical history to determine predictive factors of osteoporosis in these patients.RESULTS: The prevalence of osteoporosis in the lumbar spine was 38.3% (male, 28.9%; female, 54.0%), and 15.0% in the femoral neck (male, 10.8%; female,22.0%). The vertebral deformity rate was 46.6% (male,43.4%; female, 52.0%). Age, BMI and hemoglobin correlated with BMD (P < 0.01). In males, anemia and age > 64 years were independent predictive factors of osteoporosis in multivariate analysis. In females, back pain was an independent factor for osteoporosis.CONCLUSION: The results of this study revealed that prevalence of osteoporosis and vertebral bone deformity rate were high in gastric cancer patients, regardless of post-gastrectomy duration and operation type. Early diagnosis and a proper management plan must be established in these patients.

  16. Safe major abdominal operations:Hepatectomy, gastrectomy and pancreatoduodenectomy in elder patients

    Institute of Scientific and Technical Information of China (English)

    Yu-Lian Wu; Jun-Xiu Yu; Bin Xu

    2004-01-01

    AIM: To evaluate the impact of advanced age on outcome after hepatectomy, gastrectomy and pancreatoduodenectomy.METHODS: Two hundreds and eleven patients undergone hepatectomy, gastrectomy and pancreatoduodenectomy from January 1998 to September 2002 were analyzed retrospectively. Clinicopathologic features and operative outcome of 83 patients aged 65 years or more were compared with that in 128 younger patients aged less than 65 years.RESULTS: The nutritional state, such as pre-operation level of serum albumin and hemoglobin in the older patients was poorer than that in the younger patients. The older patients had higher comorbidities than the younger patients (48.2%vs 15.6%). No significant difference was observed in perioperative mortality, and complication rate between the older and younger patients (2.4% vs 1.6% and 22.9% vs20.3%, respectively). Multivariate analysis demonstrated that pancreatoduodenectomy, hepatectomy with resection of more than 2 segments and comorbidities were independent predictors of postoperative complication, whereas age was not (P=0.3172).CONCLUSION: It is safe for patients aged 65 years or more to undergo hepatic, pancreatic and gastric resection if great care is taken during perioperative period.

  17. Management of a case of left tracheal sleeve pneumonectomy under cardiopulmonary bypass: Anesthesia perspectives

    Directory of Open Access Journals (Sweden)

    Aman Jyoti

    2014-01-01

    Full Text Available The lung tumors with carinal involvement are frequently managed with tracheal sleeve pneumonectomy and tracheobronchial anastomosis without use of cardiopulmonary bypass (CPB. Various modes of ventilation have been described during tracheal resection and anastomosis. Use of CPB during this period allows the procedure to be conducted in a more controlled way. We performed tracheal sleeve pneumonectomy for adenoid cystic carcinoma of left lung involving carina. The surgery was performed in two stages. In the first stage, left pneumonectomy was performed and in the second stage after 48 h, tracheobronchial resection and anastomosis was performed under CPB. Second stage was delayed to avoid excessive bleeding (due to heparinization from the extensive vascular raw area left after pneumonectomy. Meticulous peri-operative planning and optimal post-operative care helped in successful management of a complex case, which is associated with high morbidity and mortality.

  18. Irradiation-induced dimensional changes of fuel compacts and graphite sleeves of OGL-1 fuel assemblies

    International Nuclear Information System (INIS)

    Experimental data are summarized on irradiation-induced dimensional changes of fuel compacts and graphite sleeves of the first to ninth OGL-1 fuel assemblies. The range of fast-neutron fluence is up to 4 x 1024 n/m2 (E > 0.18 MeV); and that of irradiation temperature is 900 - 1400 deg C for fuel compacts and 800 - 1050 deg C for graphite sleeves. The dimensional change of the fuel compacts was shrinkage under these test conditions, and the shrinkage fraction increased almost linearly with fast-neutron fluence. The shrinkage fraction of the fuel compacts was larger by 20 % in the axial direction than in the radial direction. Influence of the irradiation temperature on the dimensional-change behavior of the fuel compacts was not observed clearly; presumably the influence was hidden by scatter of the data because of low level of the fast-neutron fluence and the resultant small dimensional changes. (author)

  19. Compact YAG laser welding system and its in-process monitoring in sleeving technology

    International Nuclear Information System (INIS)

    With respect to laser sleeve repairing by YAG laser welding for damaged sections of S/G tubes in nuclear power plants, about 40,000 sleeves have already been welded up to now. After replacement of S/Gs, it is considered that the quantity of such large-scale working will decrease and small-scale working will be carried out. Therefore, the authors have developed utilization of a 1kW YAG laser oscillator of a compact single-rod type mountable in reactor containment vessels, together with a small-diameter tube welding tool of 12mm in O.D. applicable to heat exchanger tubes of 3/4 in. Further, they have put such a system to practical use that can monitor deterioration of optical parts and welding conditions in process during welding by extracting the radiation intensity of the welded area with monitoring fibers. In this paper, they will report the results of study

  20. Numerical Simulation and Experimental Validation of an Integrated Sleeve-Wedge Anchorage for CFRP Rods

    DEFF Research Database (Denmark)

    Schmidt, Jacob Wittrup; Smith, Scott T.; Täljsten, Björn; Bennitz, Anders; Goltermann, Per; Pedersen, Henning

    2011-01-01

    The tensioning of carbon fibre-reinforced polymer (CFRP) rods for prestressed concrete applications or post-tensioning repair and strengthening has met with mixed success. This is primarily due to limitations inherent in the use of traditional wedge anchors typically used for steel tendons....... Recently, an integrated sleeve-wedge anchorage has been successfully developed specifically for CFRP rods. This paper in turn presents a numerical simulation of the newly developed anchorage using ABAQUS. The three-dimensional finite element (FE) model, which considers material non-linearity, uses...... hexagonal elements for the barrel and CFRP rod and tetrahedral elements for the integrated sleeve-wedge. The simulated barrel surface strains are shown to compare well with optically measured strains, however, the numerical results are shown to be sensitive to the mechanical properties of the anchorage and...

  1. Laparoscopy-assisted versus open D2 radical gastrectomy for advanced gastric cancer without serosal invasion: a case control study

    Directory of Open Access Journals (Sweden)

    Chen Qi-Yue

    2012-11-01

    Full Text Available Abstract Background The application of laparoscopic surgery for advanced gastric cancer (AGC remains questionable on account of technical difficulty of D2 lymphadenectomy, and there has been few large-scale follow-up results regarding the oncological adequacy of laparoscopic surgery compared with that of open surgeries for AGC. The aim of this study is to evaluate technical feasibility and oncological efficacy of laparoscopy-assisted gastrectomy (LAG for advanced gastric cancer without serosal invasion. Methods From January 2008 to December 2012, 1114 patients with gastric cancer underwent D2 gastrectomy, including 336 T2 and T3 patients in term of depth of invasion. Of all 336 patients, 224 underwent LAG, while open gastrectomy (OG performed on the other 112 patients. The comparison was based on the clinicopathologic characteristics, surgical outcome, and follow-up results. Results There are not significant differences in clinicopathological characteristics between the two groups (P > 0.05. The operation time and first ambulation time was similar in the two groups. However, estimated blood loss, bowel function recovery time and duration of hospital stay were significantly less in the LAG group. No significant difference in morbidity and mortality was found between the LAG group and OG group (11.1% vs. 15.3%, P = 0.266; 0.9% vs. 1.8%, P = 0.859. The mean number of resected lymph nodes (LNS between the LAG group and OG group was similar (30.6 ± 10.1 vs. 30.3 ± 8.6, P = 0.786. Furthermore, the mean number of removed LNS in each station was not significantly different in the distal gastrectomy and total gastrectomy (P > 0.05. No statistical difference was seen in 1 year survival rate (91.5% vs. 89.8% P > 0.05 and the survival curve after surgery between the LAG group and OG group. Conclusion Laparoscopy-assisted D2 radical gastrectomy is feasible, effective and has comparative oncological efficacy compared with

  2. Decoding static and dynamic arm and hand gestures from the JPL BioSleeve

    Science.gov (United States)

    Wolf, M. T.; Assad, C.; Stoica, A.; You, Kisung; Jethani, H.; Vernacchia, M. T.; Fromm, J.; Iwashita, Y.

    This paper presents methods for inferring arm and hand gestures from forearm surface electromyography (EMG) sensors and an inertial measurement unit (IMU). These sensors, together with their electronics, are packaged in an easily donned device, termed the BioSleeve, worn on the forearm. The gestures decoded from BioSleeve signals can provide natural user interface commands to computers and robots, without encumbering the users hands and without problems that hinder camera-based systems. Potential aerospace applications for this technology include gesture-based crew-autonomy interfaces, high degree of freedom robot teleoperation, and astronauts' control of power-assisted gloves during extra-vehicular activity (EVA). We have developed techniques to interpret both static (stationary) and dynamic (time-varying) gestures from the BioSleeve signals, enabling a diverse and adaptable command library. For static gestures, we achieved over 96% accuracy on 17 gestures and nearly 100% accuracy on 11 gestures, based solely on EMG signals. Nine dynamic gestures were decoded with an accuracy of 99%. This combination of wearableEMGand IMU hardware and accurate algorithms for decoding both static and dynamic gestures thus shows promise for natural user interface applications.

  3. The efficacy of sleeve technique in primary nasolacrimal duct obstruction with a high lacrimal sac

    Directory of Open Access Journals (Sweden)

    Kyoung-Nam Kim

    2014-01-01

    Full Text Available Purpose: To evaluate the efficacy of a sleeve technique during endoscopic dacryocystorhinostomy (DCR in primary nasolacrimal duct obstruction (NLDO patients with a high lacrimal sac. Materials and Methods: The medical records of 45 patients (49 cases undergoing endoscopic DCR for primary NLDO with a high lacrimal sac were retrospectively reviewed. In 19 patients (21 cases, the thick maxilla covering the common canalicular opening was removed using a drill and a bicanalicular silicone tube was inserted (group 1. In 26 patients (28 cases, instead of removal of the thick maxilla, a sleeve was inserted into the bicanalicular silicone tube (group 2. At 6 months postoperatively, the success rate was evaluated and the size of the intranasal mucosal ostium was measured. Results: The success rates in group 1 and 2 was 90.5% and 96.4%, respectively (P = 0.400. The intranasal mucosal ostium in group 1 and 2 measured 1.7 ± 0.7 mm and 3.1 ± 1.0 mm, respectively, and the difference was significant (P = 0.042. Conclusions: In primary NLDO patients with a high lacrimal sac, DCR inserting a silicone tube and a sleeve together had a satisfactory success rate without using a drill. In comparison with traditional surgical methods, it helped enlarge the size of the intranasal mucosal ostium.

  4. XRD residual stress measurements on Alloy 600 pressurizer heater sleeve mockups

    International Nuclear Information System (INIS)

    Alloy 600 penetrations in several pressurized water reactors have experienced primary water stress corrosion cracking near the partial penetration J-welds between the Alloy 600 and the cladding on the inside diameter of the components. The microstructure and tensile properties indicated that the Alloy 600 was susceptible to primary water stress corrosion cracking (PWSCC) providing that a high tensile stress (applied + residual) was present. The residual stress distributions at the inside diameter surface and at different depths below the surface were measured in two Alloy 600 heater sleeve mockups. Surface residual stresses ranged from 340 to 690 MPa. For the most part, the residual stresses decreased with increasing depth below the surface. For the heater sleeve mockups, the percent cold-work (i.e. true plastic strain) and yield strength as a function of depth were determined. As a result of pre-reaming and welding the heater sleeves, the amount of plastic strain and yield strength increased to a nominal depth of 0.025 cm. The true plastic strain and yield strength decreased with increasing depth below the surface

  5. Prognostic significance of metastatic lymph nodes ratio in patients with gastric adenocarcinoma after curative gastrectomy

    Institute of Scientific and Technical Information of China (English)

    Zhang Meiling; Wang Jian; Shi Wei; Chen Wenjiao; Li Wei; Shu Yongqian; Liu Ping

    2014-01-01

    Background We evaluated the impact of the number of metastatic lymph nodes and the metastatic lymph nodes ratio (the ratio between metastatic lymph nodes and total dissected lymph nodes,MLNR) in patients with gastric adenocaminoma following curative gastrectomy and also analyzed the relationship between the number of removed lymph nodes and prognosis in node-negative gastric cancer.Methods From January 2005 to December 2010,1 390 patients who were diagnosed with gastric adenocarcinoma and underwent curative gastrectomy were included.In particular,lymph node metastasis was not present in 515 patients.The number of metastatic lymph nodes and the metastatic lymph nodes ratio were selected for univariate and multivariate analyses to evaluate their influences on the disease outcome.The survival curve was presented according to the number of removed lymph nodes in node-negative gastric cancer using Kaplan-Meier plots.Results The overall 5-year survival rate was 54% in this group.Univariate analysis revealed that age category,macroscopic appearance,histological grade,tumor size,depth of primary tumor invasion,number of metastatic lymph nodes,metastatic lymph nodes ratio,tumor,nodes,metastasis-classification (TNM) stage and status of lymphovascular,and vessel invasion have significant impact on survival.The number of metastatic lymph nodes and the metastatic lymph nodes ratio both have significant impact on survival (P <0.001).However,in multivariate analyses,only the metastatic lymph nodes ratio was identified to be an independent prognostic factor (P <0.001).The number of removed lymph nodes in node-negative was a strong prognostic factor of survival,the more lymph nodes dissected,the better the survival.Conclusions The metastatic lymph nodes ratio has more significant prognostic value for survival in patients with gastric cancer following curative gastrectomy than the number of metastatic lymph nodes.The number of removed lymph nodes miaht be an important

  6. Concurrent Robot-Assisted Distal Gastrectomy and Partial Nephrectomy for Synchronous Early Gastric Cancer and Renal Cell Carcinoma: An Initial Experience

    OpenAIRE

    Kim, Jieun; Kim, Su Mi; Seo, Jeong Eun; Choi, Min Gew; Lee, Jun Ho; Sohn, Tae Sung; Kim, Sung; Bae, Jae Moon; Seo, Seong Il

    2014-01-01

    We report our experience of a concurrent robot assisted distal gastrectomy and partial nephrectomy for synchronous early gastric cancer and renal cell carcinoma. A 55-year-old female patient was diagnosed with early gastric cancer on screening endoscopy. Abdominal computed tomography showed an incidental right renal cell carcinoma. Robot assisted distal gastrectomy was performed, followed by partial nephrectomy. The final pathological examination showed signet ring cell carcinoma within the l...

  7. Stem cell impregnated nanofiber stent sleeve for on-stent production and intravascular delivery of paracrine factors.

    Science.gov (United States)

    Hwang, Chao-Wei; Johnston, Peter V; Gerstenblith, Gary; Weiss, Robert G; Tomaselli, Gordon F; Bogdan, Virginia E; Panigrahi, Asmi; Leszczynska, Aleksandra; Xia, Zhiyong

    2015-06-01

    Stem cell therapies for atherosclerotic diseases are promising, but benefits remain modest with present cell delivery devices in part due to cell washout and immune attack. Many stem cell effects are believed mediated by paracrine factors (PFs) secreted by the stem cells which potentiate tissue repair via activation and enhancement of intrinsic host repair mechanisms We therefore sought to create an "intravascular paracrine factor factory" by harnessing stem cells on a stent using a nanofiber (NF) stent sleeve, and thus providing a sheltered milieu for cells to continuously produce PFs on-stent. The NF sleeve acts as a substrate on which stem cells grow, and as a semi-permeable barrier that protects cells from washout and host immune response while allowing free outward passage of PFs. NF stent sleeves were created by covering stents with electrospun poly-lactic-co-glycolic acid nanofibers and were then uniformly coated with mesenchymal stem cells (MSCs). NF sleeves blocked cell passage but did not hamper MSC attachment or proliferation, and did not alter MSC morphology or surface markers. NF sleeve MSCs continued to secrete PFs that were biologically active and successfully induced tubulogenesis in human endothelial cells. NF stent sleeves seeded with allogeneic MSCs implanted in pigs remained patent at 7 days without thrombotic occlusion or immune rejection. Our results demonstrate the feasibility of creating an intravascular PF factory using a stem cell impregnated NF stent sleeve, and pave the way for animal studies to assess the efficacy of local PF production to treat ischemic artery disease. PMID:25818438

  8. Traumatic Neuroma around the Celiac Trunk after Gastrectomy Mimicking a Nodal Metastasis: A Case Report

    Energy Technology Data Exchange (ETDEWEB)

    Kwon, Jung Hyeok; Ryu, Seung Wan; Kang, Yu Na [Keimyung University School of Medicine, Daegu (Korea, Republic of)

    2007-06-15

    Traumatic neuroma is a well-known disorder that occurs after trauma or surgery involving the peripheral nerve and develops from a nonneoplastic proliferation of the proximal end of a severed, partially transected, or injured nerve. However, in the abdomen, traumatic neuromas have been sporadically reported to occur in the bile duct. We present here a case of traumatic neuroma around the celiac trunk after gastrectomy that mimicks a nodal metastasis. In conclusion, the imaging finding of traumatic neuroma around the celiac trunk was a homogeneous hypovascular mass without narrowing or irregularity of encased arteries and without increased uptake on PET-CT. Although from a clinical standpoint, establishing an accurate preoperative diagnosis is difficult to perform, the presence of a traumatic neuroma should be included in the differential diagnosis of a mass around the celiac trunk in a patient that has undergone celiac nodal dissection.

  9. [Advantages and disadvantages of three-dimensional technique in laparoscopic gastrectomy for gastric cancer].

    Science.gov (United States)

    Huang, Changming; Lin, Jianxian

    2016-02-25

    Recently, the technological advancements have led to the introduction of new three-dimension (3D) laparoscopic system. 3D technique in laparoscopic radical gastrectomy provides an abdominal strong stereoscopic depth and accurate operative field, and can be helpful for the beginner to shorten the learning curve. Moreover, spatial orientation becomes more accurate with 3D technique. 3D technique also has the advantages of clearer anatomical level, better vessel exposure, lymph node dissection and digestive tract reconstruction. However, there are still some defects of 3D laparoscopic system. For example, the surgeon may not adapt to 3D vision at the beginning, and special equipment is required to display the data. PMID:26831878

  10. When Eastern Surgeons Meet Western Patients: A Pilot Study of Gastrectomy with Lymphadenectomy in Caucasian Patients at a Single Korean Institute.

    Science.gov (United States)

    Nakagawa, Masatoshi; Choi, Yoon Young; An, Ji Yeong; Seo, Sang Hyuk; Shin, Hyun Beak; Bang, Hui Jae; Li, Shuangxi; Kim, Hyung Il; Cheong, Jae Ho; Hyung, Woo Jin; Noh, Sung Hoon

    2016-09-01

    East Asian surgeons generally report lower morbidity and mortality rates for gastrectomy with D2 lymphadenectomy than do surgeons in Western countries; however, the disparity remains unexplained. The aim of this article was to determine the feasibility and safety regarding cases in which East Asian surgeons perform such procedures in Caucasian patients (CPs). Twelve CPs underwent gastrectomy with lymphadenectomy for gastric cancer at Yonsei University Severance Hospital, Seoul, Korea between June 2011 and April 2014. Procedures performed included total gastrectomy (7 of 12, 58%), distal gastrectomy (4 of 12, 33%), and completion total gastrectomy (1 of 12, 8%). Nine patients (75%) underwent D2 lymphadenectomy, and D1+ lymphadenectomy was performed in three others (25%). In four patients (33%), combined resections were carried out. The median values of surgical parameters were as follows: operative time, 266.5 min (range, 120-586 min); estimated blood loss, 90 mL (range, 37-350 mL); retrieved lymph node count, 37.5 (range, 22-63); and postoperative hospital stay, 13.7 days (range, 5-63 days). No mortality was encountered, although two patients (17%) experienced complications (both Clavien-Dindo classification grade IIIa anastomotic leakages), which were successfully managed by conservative treatment. In the hands of East Asian surgeons, mortality and short-term morbidity appears to be acceptably low in CPs subjected to gastrectomy with lymphadenectomy for gastric cancer. PMID:27401666

  11. CT-guided 125I Radioactive Seed Implantation on Regional Lymph Node Metastasis after Gastrectomy

    Directory of Open Access Journals (Sweden)

    Liangrong Shi

    2013-09-01

    Full Text Available Objective: To evaluate the safety and short-term effect of CT-guided 125I radioactive seed implantation on regional lymph node metastasis after gastrectomy. Methods: Twenty-three patients with regional lymph node metastasis after gastrectomy received CT-guided 125I radioactive seed implantation from June, 2007 to July, 2011 in our hospital. The overall activity and amount of radioactive seeds were calculated by simulating source distribution of radioactive seed implantation plan system before operation. 125I seeds were implanted under the guidance of CT. Effective rate was evaluated according to RECIST criterion, 1, 2 and 3 years of survival rates were calculated by life table method, the effect of relative factors on survival was tested by univariate COX model, and the survival differences between subgroups were compared to draw survival curve by log-rank method. Additionally, systemic therapies were given to 20 patients based on fluorouracil drugs. Results: No severe complications was observed in all study subjects with 14 complete remission (60.9 % , 5 particle remission (21.7 % and 4 progressive diseases (17.4 % , while 1, 2 and 3 years of survival rates as well as median survival time being (87±7 %,(47±11 % , (13±9 % and (22.1±5.1 months, respectively. Univariate COX analysis showed that the maximum diameter of tumor could badly influence the prognosis (χ2 = 9.752, P = 0.002, and the subgroups analysis relieved the significant difference (χ2 = 5.828, P = 0.016, log-rank test with 3 cm being the cut-off value. Conclusion: CT-guided 125I radioactive seed implantation has high local control rate with small trauma and slight complications.

  12. Effects of Different Operative Procedures on the Digestive and Nutritional Status of Patients Treated with a Gastrectomy for Gastric Cancer

    Institute of Scientific and Technical Information of China (English)

    Han Liang; Xishan Hao

    2006-01-01

    Postgastrectomy syndromes evoked by the loss of several gastric functions after total or subtotal gastrectomy are very common. Different kinds of reconstruction have been developed to overcome the problem. Patients with preservation of a duodenal passage and jejunal interposition with or without a pouch show a better quality of life and minimal symptoms postoperatively. A jejunal interposition with or without a pouch after proximal or distal subtotal gastrictomy seems to improve the nutritional condition and quality of life. The prognostic nutritional index (PNI), Visick score, Spitzer index and the European Organization for Research and Treatment of Cancer (EORTC) questionnaire (QLQ-C30) are available to evaluate the quality of life and nutritional status after gastrectomy.

  13. Subtotal gastrectomy for diffused hemorrhagic gastritis induced by radiation, following liver resection for hilar cholangiocarcinoma. A case report

    Science.gov (United States)

    Vasileios, Tatsis; Evaggelia, Peponi; Georgios, Papadopoulos; Periklis, Tsekeris; Michael, Fatouros; Georgios, Glantzounis

    2015-01-01

    Introduction A rare case of hemorrhagic gastritis induced by radiation is presented, which was resistant to conservative treatment and required subtotal gastrectomy. Presentation of case A 56-year-old male was initially undergone right hepatectomy, resection of the extrahepatic biliary tree, hilar lymph node dissection and hepatico-jejunostomy due to advanced hilar cholangiocarcinoma. Because of the extent of the disease, chemo-radiotherapy was administered. The patient received a total radiotherapy dose of 57.6 Gy in 32 sessions. Unfortunately, diffused hemorrhagic gastritis induced by radiation was developed, which was resistant to conservative treatment (endoscopic hemostasis, transfusion). A subtotal gastrectomy was performed. The patient is in good condition 45 months after the liver resection, but with local recurrence. Conclusion In resistant situations to conservative treatment and recurred bleeding of diffused hemorrhagic gastritis induced by radiation, surgical management may have a role. PMID:26686486

  14. Late onset of chylous ascites following distal gastrectomy with D1(+ dissection for gastric cancer: A case report

    Directory of Open Access Journals (Sweden)

    Hüseyin Çiyiltepe

    2015-12-01

    Full Text Available Chyloperitoneum is the accumulation of lymphatic fluid in the peritoneal cavity. Chylous ascites can occur if it is not recognized during surgery. The incidence of chylous ascites after oncological surgery was approximately 7.4% however, the incidence of lymphorrhea after radical gastrectomy for gastric cancer is so low. Extensive lymph node dissection leads to a higher incidence of lymphorrhea. There have been few cases associated with D1 dissection In most patients conservative treatment is recommended that includes paracentesis, total parenteral nutrition (TPN, a medium chain triglyceride (MCT based diet, and somatostatin. Surgery is the last choice only when conservative treatment fails. In this case we aimed to present a late onset of chylous ascites after subtotal gastrectomy and D1+ dissection that was treated with percutaneous drainage and conservative management.

  15. Structure and properties of braided sleeve preforms for chemical vapor infiltration

    Energy Technology Data Exchange (ETDEWEB)

    Starr, T.L.; Fiadzo, O.G.; Hablutzel, N. [Georgia Inst. of Tech., Atlanta, GA (United States). School of Materials Science and Technology

    1998-04-01

    In all composites the properties and structure of the reinforcement strongly influence the performance of the material. For some composites, however, the reinforcement also affects the fabrication process itself exerting an additional, second order influence on performance. This is the case for the chemical vapor infiltration (CVI) process for fabrication of ceramic matrix composites. In this process the matrix forms progressively as a solid deposit, first onto the fiber surfaces, then onto the previous layer of deposit, ultimately growing to fill the inter-fiber porosity. The transport of reactants to the surfaces and the evolved morphology of the matrix depend on the initial reinforcement structure. This structure can vary greatly and is controlled by such factors as fiber size and cross-section, the number of filaments and amount of twist per tow or yarn, and the weave or braid architecture. Often the choice of reinforcement is based on mechanical performance analysis or on the cost and availability of the material or on the temperature stability of the fiber. Given this choice, the composite densification process--CVI--must be optimized to attain a successful material. Ceramic fiber in the form of cylindrical braided sleeve is an attractive choice for fabrication of tube-form ceramic matrix composites. Multiple, concentric layers of sleeve can be placed over a tubular mandrel, compressed and fixed with a binder to form a freestanding tube preform. This fiber architecture is different than that created by layup of plain weave cloth--the material used in most previous CVI development. This report presents the results of the investigation of CVI densification of braided sleeve preforms and the evolution of their structure and transport properties during processing.

  16. Fast-track surgery protocol in elderly patients undergoing laparoscopic radical gastrectomy for gastric cancer: a randomized controlled trial

    OpenAIRE

    Liu G; Jian F; Wang X; Chen L

    2016-01-01

    Guozheng Liu,1 Fengguo Jian,2 Xiuqin Wang,2 Lin Chen1 1Department of General Surgery, Chinese PLA General Hospital, Beijing, People’s Republic of China; 2Second Department of General Surgery, Changyi People’s Hospital, Shandong, People’s Republic of China Aim: To study the efficacy of the fast-track surgery (FTS) program combined with laparoscopic radical gastrectomy for elderly gastric cancer (GC) patients.Methods: Eighty-four elderly patients diagnosed with GC between Se...

  17. Fast-track surgery protocol in elderly patients undergoing laparoscopic radical gastrectomy for gastric cancer: a randomized controlled trial

    OpenAIRE

    Chen, Linpayi

    2016-01-01

    Guozheng Liu,1 Fengguo Jian,2 Xiuqin Wang,2 Lin Chen1 1Department of General Surgery, Chinese PLA General Hospital, Beijing, People’s Republic of China; 2Second Department of General Surgery, Changyi People’s Hospital, Shandong, People’s Republic of China Aim: To study the efficacy of the fast-track surgery (FTS) program combined with laparoscopic radical gastrectomy for elderly gastric cancer (GC) patients.Methods: Eighty-four elderly patients diagnosed with G...

  18. Percutaneous placement of self-expandable metallic stents in patients with obstructive janudice secondary to metastalic gastric cancer after gastrectomy

    International Nuclear Information System (INIS)

    To evaluate the outcomes of patients undergoing percutaneous placements of a biliary stent for obstructive jaundice secondary to metastatic gastric cancer after gastrectomy. Fifty patients (mean age, 62.4 years; range, 27-86 years) who underwent percutaneous placements of a biliary stent for obstructive jaundice secondary to metastatic gastric cancer after gastrectomy were included. The technical success rate, clinical success rate, complication rate, stent patency, patient survival and factors associated with stent patency were being evaluated. The median interval between the gastrectomy and stent placement was 23.1 months (range, 3.9-94.6 months). The 50 patients received a total of 65 stents without any major procedure-related complications. Technical success was achieved in all patients. The mean total serum bilirubin level, which had been 7.19 mg/dL ± 6.8 before stent insertion, decreased to 4.58 mg/dL ± 5.4 during the first week of follow-up (p < 0.001). Clinical success was achieved in 42 patients (84%). Percutaneous transhepatic biliary drainage catheters were removed from 45 patients (90%). Infectious complications were noted in two patients (4%), and stent malfunction occurred in seven patients (14%). The median stent patency was 233 ± 99 days, and the median patient survival was 179 ± 83 days. Total serum bilirubin level after stenting was an independent factor for stent patency (p = 0.009). Percutaneous transhepatic placement of a biliary stent for obstructive jaundice secondary to metastatic gastric cancer after gastrectomy is a technically feasible and clinically effective palliative procedure.

  19. Percutaneous placement of self-expandable metallic stents in patients with obstructive janudice secondary to metastalic gastric cancer after gastrectomy

    Energy Technology Data Exchange (ETDEWEB)

    Hong, Hyun Pyo [Dept. of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul (Korea, Republic of); Seo, In Ho; Yu, Jung Rim; Mok, Young Jae; Oh, Joo Hyeong [Korea University Guro Hospital, Korea University College of Medicine, Seoul (Korea, Republic of); Kwon, Se Hwan [Dept. of Radiology, Kyung Hee University Medical Center, Seoul (Korea, Republic of); Kim, Sam Soo [Dept. of Radiology, Kangwon National University College of Medicine, Chuncheon (Korea, Republic of); Kim, Seung Kwon [Division of Interventional Radiology, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis (United States)

    2013-10-15

    To evaluate the outcomes of patients undergoing percutaneous placements of a biliary stent for obstructive jaundice secondary to metastatic gastric cancer after gastrectomy. Fifty patients (mean age, 62.4 years; range, 27-86 years) who underwent percutaneous placements of a biliary stent for obstructive jaundice secondary to metastatic gastric cancer after gastrectomy were included. The technical success rate, clinical success rate, complication rate, stent patency, patient survival and factors associated with stent patency were being evaluated. The median interval between the gastrectomy and stent placement was 23.1 months (range, 3.9-94.6 months). The 50 patients received a total of 65 stents without any major procedure-related complications. Technical success was achieved in all patients. The mean total serum bilirubin level, which had been 7.19 mg/dL ± 6.8 before stent insertion, decreased to 4.58 mg/dL ± 5.4 during the first week of follow-up (p < 0.001). Clinical success was achieved in 42 patients (84%). Percutaneous transhepatic biliary drainage catheters were removed from 45 patients (90%). Infectious complications were noted in two patients (4%), and stent malfunction occurred in seven patients (14%). The median stent patency was 233 ± 99 days, and the median patient survival was 179 ± 83 days. Total serum bilirubin level after stenting was an independent factor for stent patency (p = 0.009). Percutaneous transhepatic placement of a biliary stent for obstructive jaundice secondary to metastatic gastric cancer after gastrectomy is a technically feasible and clinically effective palliative procedure.

  20. Gastric Banding

    Science.gov (United States)

    ... gastric banding before deciding to have the procedure. Advertisements for a device or procedure may not include ... feeds Follow FDA on Twitter Follow FDA on Facebook View FDA videos on YouTube View FDA photos ...

  1. Repair boundary for parent tube indications within the upper joint zone of hybrid expansion joint (HEJ) sleeved tubes

    International Nuclear Information System (INIS)

    In the Spring and Fall of 1994, and the Spring of 1995, crack-like indications were found in the upper hybrid expansion joint (HEJ) region of Steam Generator (S/G) tubes which had been sleeved using Westinghouse HEJ sleeves. As a result of these findings, analytic and test evaluations were performed to assess the effect of the degradation on the structural, and leakage, integrity of the sleeve/tube joint relative to the requirements of the United States Nuclear Regulatory Commission's (NRC) draft Regulatory Guide (RG) 1.121. The results of these evaluations demonstrated that tubes with implied or known crack-like circumferential parent tube indications (PTIs) located 1.1 inches or farther below the bottom of the hardroll upper transition, have sufficient, and significant, integrity relative to the requirements of RG 1.121. Thus, the purpose of this report is to provide background information related to the justification of the modified tube repair boundary

  2. Repair boundary for parent tube indications within the upper joint zone of hybrid expansion joint (HEJ) sleeved tubes

    Energy Technology Data Exchange (ETDEWEB)

    Cullen, W.K.; Keating, R.F. [Westinghouse Electric, Pittsburgh, PA (United States)

    1997-02-01

    In the Spring and Fall of 1994, and the Spring of 1995, crack-like indications were found in the upper hybrid expansion joint (HEJ) region of Steam Generator (S/G) tubes which had been sleeved using Westinghouse HEJ sleeves. As a result of these findings, analytic and test evaluations were performed to assess the effect of the degradation on the structural, and leakage, integrity of the sleeve/tube joint relative to the requirements of the United States Nuclear Regulatory Commission`s (NRC) draft Regulatory Guide (RG) 1.121. The results of these evaluations demonstrated that tubes with implied or known crack-like circumferential parent tube indications (PTIs) located 1.1 inches or farther below the bottom of the hardroll upper transition, have sufficient, and significant, integrity relative to the requirements of RG 1.121. Thus, the purpose of this report is to provide background information related to the justification of the modified tube repair boundary.

  3. Distribution of fission products in graphite sleeves and blocks of the eleventh and twelfth OGL-1 fuel assemblies

    International Nuclear Information System (INIS)

    The 11th and 12th fuel assemblies were irradiated in an in-pile gas loop, OGL-1, installed in the Japan Materials Testing Reactor (JMTR) of Japan Atomic Energy Research Institute (JAERI). Distribution of fission products in the graphite sleeves and blocks of the assemblies was measured by gamma-ray spectrometry. The 11th fuel assembly was aimed at testing the irradiation performance of mass product fuels in trial manufacturing of the first charge fuel for the High Temperature Engineering Test Reactor (HTTR) in relatively short irradiation, and the 12th assembly in long-term irradiation. The 12th assembly attained a burnup approximately as high as that of the HTTR driver fuel design. In the graphite sleeve of the 11th assembly, high concentration peaks of fission products were found in the axial distribution. Exposure of failed fuel particles was not detected on the surface of fuel compacts, while fissures of graphite matrix at overcoat boundaries were observed on the surface. These results led to a presumption that fission products, which were released from failed particles located inside of the fuel compact, was easily transported through the fissures of the matrix to the inner surface of the sleeve. In the graphite sleeve of the 12th assembly, 110mAg was detected together with other fission products of 137Cs, 134Cs etc. Silver-110m showed characteristic distribution: this nuclides was less concentrated at the region with highly concentrated 60Co which is presumed to have been transported from melted sheath material of thermocouples to the graphite sleeve. It was inferred from the distribution that the transport behavior of 110mAg had been influenced by co-sorption or by pore structure change in the graphite material of the sleeve, which had been induced by metallic elements including cobalt. (author)

  4. Distribution of fission products in graphite sleeves and blocks of the eleventh and twelfth OGL-1 fuel assemblies

    Energy Technology Data Exchange (ETDEWEB)

    Hayashi, Kimio; Fukuda, Kousaku; Kikuchi, Teruo [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment; Tsuruta, Harumichi

    1994-06-01

    The 11th and 12th fuel assemblies were irradiated in an in-pile gas loop, OGL-1, installed in the Japan Materials Testing Reactor (JMTR) of Japan Atomic Energy Research Institute (JAERI). Distribution of fission products in the graphite sleeves and blocks of the assemblies was measured by gamma-ray spectrometry. The 11th fuel assembly was aimed at testing the irradiation performance of mass product fuels in trial manufacturing of the first charge fuel for the High Temperature Engineering Test Reactor (HTTR) in relatively short irradiation, and the 12th assembly in long-term irradiation. The 12th assembly attained a burnup approximately as high as that of the HTTR driver fuel design. In the graphite sleeve of the 11th assembly, high concentration peaks of fission products were found in the axial distribution. Exposure of failed fuel particles was not detected on the surface of fuel compacts, while fissures of graphite matrix at overcoat boundaries were observed on the surface. These results led to a presumption that fission products, which were released from failed particles located inside of the fuel compact, was easily transported through the fissures of the matrix to the inner surface of the sleeve. In the graphite sleeve of the 12th assembly, {sup 110m}Ag was detected together with other fission products of {sup 137}Cs, {sup 134}Cs etc. Silver-110m showed characteristic distribution: this nuclides was less concentrated at the region with highly concentrated {sup 60}Co which is presumed to have been transported from melted sheath material of thermocouples to the graphite sleeve. It was inferred from the distribution that the transport behavior of {sup 110m}Ag had been influenced by co-sorption or by pore structure change in the graphite material of the sleeve, which had been induced by metallic elements including cobalt. (author).

  5. Analysis of the stem-sleeve interface in a modular titanium alloy femoral component for total hip replacement

    Energy Technology Data Exchange (ETDEWEB)

    Kurtz, S.M. [Drexel Univ., Philadelphia, PA (United States). School of Biomedical Engineering, Science and Health Systems; Thomas Jefferson Univ., Philadelphia, PA (United States). Dept. of Orthopaedic Surgery; Exponent, Inc., Philadelphia, PA (United States); Srivastav, S.; Brown, S.B. [Exponent, Inc., Philadelphia, PA (United States); Dwyer, K.; Ochoa, J. [DePuy Orthopaedics, Inc., Warsaw, IN (United States)

    2001-07-01

    Modular femoral components for total hip arthroplasty have been clinically available since the 1980s. Despite the widespread use of interlocking tapers in hip prostheses, researchers have raised concerns about fretting and wear, which has been clinically observed at the tapered modular interface of retrieved femoral heads and the trunnions, as well as at the stem-sleeve junctions of retrieved femoral stems. Fretting may play an important role in the mechanics of the stem-sleeve interface of a modular titanium alloy femoral component. However, the interface mechanics of the stem-sleeve junction are currently not well understood. Consequently, the goal of the present study was to develop a three-dimensional finite element model of a commercially available titanium alloy modular femoral component. The model was constructed to include the proximal support boundary conditions proposed by previous researchers during in vitro structural fatigue testing. A parametric finite element model of the femoral stem and the in vitro support conditions was constructed, and frictional contact was modeled between the proximal stem and sleeve. We investigated the effect of varying the implant size, the stem-sleeve coefficient of friction, and the direction (but not the magnitude) of the resultant load applied at the femoral head. Of these three variables, implant size had the greatest effect on the state of stress in the stem. The finite element model of the femoral stem and proximal sleeve developed in this study provides a first step towards synthesizing previous functional fatigue testing data reported in the literature for this design. The parametric model will also serve as a useful basis for developing future fatigue studies for this design based on proximally supported boundary conditions. (orig.)

  6. Numerical Analysis and Experimental Study of Hard Roofs in Fully Mechanized Mining Faces under Sleeve Fracturing

    Directory of Open Access Journals (Sweden)

    Zhitao Zheng

    2015-11-01

    Full Text Available Sudden falls of large-area hard roofs in a mined area release a large amount of elastic energy, generate dynamic loads, and cause disasters such as impact ground pressure and gas outbursts. To address these problems, in this study, the sleeve fracturing method (SFM was applied to weaken a hard roof. The numerical simulation software FLAC3D was used to develop three models based on an analysis of the SFM working mechanism. These models were applied to an analysis of the fracturing effects of various factors such as the borehole diameter, hole spacing, and sleeve pressure. Finally, the results of a simulation were validated using experiments with similar models. Our research indicated the following: (1 The crack propagation directions in the models were affected by the maximum principal stress and hole spacing. When the borehole diameter was fixed, the fracturing pressure increased with increasing hole spacing. In contrast, when the fracturing pressure was fixed, the fracturing range increased with increasing borehole diameter; (2 The most ideal fracturing effect was found at a fracturing pressure of 17.6 MPa in the model with a borehole diameter of 40 mm and hole spacing of 400 mm. The results showed that it is possible to regulate the falls of hard roofs using the SFM. This research may provide a theoretical basis for controlling hard roofs in mining.

  7. Study on grout-filled coupling steel sleeve. Part 1. Basic characteristics; Kokan sleeve wo mochiita grout juten shiki tekkin tsugite ni kansuru kenkyu. 2. Kisoteki seino

    Energy Technology Data Exchange (ETDEWEB)

    Takeda, K.; Shimizu, T.; Hayashi, Y.; Sato, Y. [Okumura Corp., Osaka (Japan)

    1994-11-15

    With an objective to establish a design technology on a grout-filled bar-reinforced joint consisted of a sleeve made of electric resistance welded steel tube and grout, discussions were given on the effects of different factors on the joint performance. The factors discussed include the kinds of grout (cement paste and mortar), reinforcing bar settlement length, and reinforcing bar quality. Increase in the grout strength causes the joint strength and rigidity to increase. To obtain the strength and rigidity equivalent to those in the reinforcing bars in the base material, the compaction strength required in the grout for the case of SB400 class reinforcing bars is 900 kgf/cm{sup 2}. A longer settlement length may increase the joint strength and rigidity, but its effect on tenacity is not clear. Increased grout strength can improve the tenacity. The maximum deposition stress increases in proportion with the compaction strength of the grout in any of the reinforcing bar unyielding positions and the yield occurring positions. The experiment resulted in estimating the following three fracture modes: a fracture mode with reinforcing bar slipping out without yield, a fracture mode with a reinforcing bar slipping out after yield, and a reinforcing bar tensile fracture mode. 7 refs., 7 figs., 2 tabs.

  8. Comparative study of laparoscopic vs open gastrectomy in gastric cancer management

    Institute of Scientific and Technical Information of China (English)

    Giuseppe S Sica; Edoardo Iaculli; Livia Biancone; Sara Di Carlo; Rosa Scaramuzzo; Cristina Fiorani; Paolo Gentileschi; Achille L Gaspari

    2011-01-01

    AIM: To compare long-term results of gastric cancer patients undergoing laparoscopic and open gastrectomy in a single unit.METHODS: From February 2000 to September 2004, all patients with adenocarcinoma of the stomach were assessed to entry in this longitudinal prospective non-randomized trial. Primary endpoint was cancer-related survival and secondary endpoints were overall survival, evaluation of surgical complications and mortality.RESULTS: Fifty-eight patients were enrolled. Forty-seven patients were followed-up (range 11-103, median 38 mo). Four patients were lost at follow up. Twenty-two patients underwent a laparoscopic gastric surgery (LGS) and 25 had a standard open procedure (OGS). No statistical difference was found between the two groups in terms of 5 years cancer-related mortality rate (50% vs 52%, P = 1), and 5 years overall mortality rate (54.5% vs 56%, P = 1). Accordingly, cancer-related and overall survival probability by Kaplan-Meier method showed comparable results (P = 0.81 and P = 0.83, respectively). We found no differences in surgical complications in the 2 groups. There was no conversion to open surgery in this series.CONCLUSION: LGS is as effective as OGS in the management of advanced gastric cancer. However LGS cannot be recommended routinely over OGS for the treatment of advanced gastric cancer.

  9. Chronological Changes of Quality of Life in Long-Term Survivors after Gastrectomy for Gastric Cancer

    Science.gov (United States)

    Yu, Wansik; Park, Ki Bum; Chung, Ho Young; Kwon, Oh Kyoung; Lee, Seung Soo

    2016-01-01

    Purpose A few studies have prospectively evaluated changes in quality of life (QoL) after surgery in short-term survivors; however, no prospective study has evaluated the longitudinal changes in QoL in long-terms survivors. We prospectively evaluated the chronological changes in QoL after a gastrectomy over a 5-year postoperative period in a large group of patients. Materials and Methods QoL data from the European Organization for Research and Treatment of Cancer QLQ-C30 and the QLQ-STO22 questionnaires were obtained from 254 patients who completed the entire series of QoL assessments preoperatively and at 1, 2, 3, 4, and 5 years after surgery. Results There was no statistically significant change in global health status/QoL during the 5-year postoperative period. Decreases in QoL from upper gastrointestinal symptoms including diarrhea (p physical functioning (p physical functioning, role functioning, and body image. In addition, patients should be encouraged to preserve self-esteem and maintain social activity. PMID:27004956

  10. Evaluation of gallbladder motility in patients following total gastrectomy (Roux-en-Y) by infusion cholescintigraphy

    International Nuclear Information System (INIS)

    Background: The aim of the study is to evaluate gallbladder (GB) motor function, by infusion cholescintigraphy, in patients after total gastrectomy (Roux-en-Y) with expected disturbances in the physiological regulation of biliary tract motility. Methods: The study was done in 10 controls, as well as in 12 patients early (less than 2 months) and in 14 late (6 months-2 years) after surgery. Anterior abdominal imaging by gamma camera and computer acquisition was performed during three-hours infusion of 150 MBq, preceded by the loading dose of 50 MBq of 99mTc-EHIDA in bolus injection. The test meal stimulation was done in the 120th min of the study. GB TA curve was obtained and five parameters of GB motility were analysed: durations of filling (ascending) and emptying (descending) phases, filling and emptying rate ratio and ejection fraction and rate. Results: Our results have shown that in the early period after the operation GB filling is prolonged and emptying impaired, while after several months GB motor function is normalised. Conclusions: It can be concluded that the infusion cholescintigraphy is potentially useful in patients after such surgery to decide on the specific treatment introduction in order to prevent GB calculosis and other complications. (author)

  11. Biological conduit small gap sleeve bridging method for peripheral nerve injury:regeneration law of nerve ifbers in the conduit

    Institute of Scientific and Technical Information of China (English)

    Pei-xun Zhang; Li-ya A; Yu-hui Kou; Xiao-feng Yin; Feng Xue#; Na Han; Tian-bing Wang; Bao-guo Jiang

    2015-01-01

    The clinical effects of 2-mm small gap sleeve bridging of the biological conduit to repair periph-eral nerve injury are better than in the traditional epineurium suture, so it is possible to replace the epineurium suture in the treatment of peripheral nerve injury. This study sought to identify the regeneration law of nerve fibers in the biological conduit. A nerve regeneration chamber was constructed in models of sciatic nerve injury using 2-mm small gap sleeve bridging of a biodegradable biological conduit. The results showed that the biological conduit had good his-tocompatibility. Tissue and cell apoptosis in the conduit apparently lessened, and regenerating nerve ifbers were common. The degeneration regeneration law of Schwann cells and axons in the conduit was quite different from that in traditional epineurium suture. During the prime period for nerve fiber regeneration (2–8 weeks), the number of Schwann cells and nerve fibers was higher in both proximal and distal ends, and the effects of the small gap sleeve bridging method were better than those of the traditional epineurium suture. The above results provide an objec-tive and reliable theoretical basis for the clinical application of the biological conduit small gap sleeve bridging method to repair peripheral nerve injury.

  12. Biological conduit small gap sleeve bridging method for peripheral nerve injury: regeneration law of nerve fibers in the conduit

    Directory of Open Access Journals (Sweden)

    Pei-xun Zhang

    2015-01-01

    Full Text Available The clinical effects of 2-mm small gap sleeve bridging of the biological conduit to repair peripheral nerve injury are better than in the traditional epineurium suture, so it is possible to replace the epineurium suture in the treatment of peripheral nerve injury. This study sought to identify the regeneration law of nerve fibers in the biological conduit. A nerve regeneration chamber was constructed in models of sciatic nerve injury using 2-mm small gap sleeve bridging of a biodegradable biological conduit. The results showed that the biological conduit had good histocompatibility. Tissue and cell apoptosis in the conduit apparently lessened, and regenerating nerve fibers were common. The degeneration regeneration law of Schwann cells and axons in the conduit was quite different from that in traditional epineurium suture. During the prime period for nerve fiber regeneration (2-8 weeks, the number of Schwann cells and nerve fibers was higher in both proximal and distal ends, and the effects of the small gap sleeve bridging method were better than those of the traditional epineurium suture. The above results provide an objective and reliable theoretical basis for the clinical application of the biological conduit small gap sleeve bridging method to repair peripheral nerve injury.

  13. Behandling med duodenal-jejunal bypass-sleeve ved svær overvægt

    DEFF Research Database (Denmark)

    Rohde, Ulrich; Gylvin, Silas; Vilmann, Peter;

    2014-01-01

    Overweight and obesity are risk factors for several co-morbidities reducing life expectancy. Conservative treatment of obesity is generally ineffective in the long-term. Bariatric surgery has proven effective, but is associated with potential complications. Duodenal-jejunal bypass sleeve is a novel...

  14. FEM simulation of tapered cap floating sleeve antenna for hepatocellular carcinoma therapy.

    Science.gov (United States)

    Maini, Surita

    2016-01-01

    Malignant liver tumors are the sixth most common and deadly cancer in the world and the third most common cause of cancer mortality. Hepatocellular carcinoma (primary liver cancer) is one of the most common malignancies worldwide with one of the highest mortality rates. Microwave ablation (MWA) is a new, promising, and multidisciplinary technology designed to destroy unhealthy tissue of various natures by radiating electromagnetic waves with microwave antennas. The finite element method (FEM) has been used in the present work to generate the simulated models of tapered cap floating sleeve antenna for validation of its design concepts, because FEM allows modeling of complex geometries that cannot be solved by analytical methods or finite difference models. The performances have been evaluated in terms of objective metrics, ablation zone, antenna matching, power absorption and SAR pattern. PMID:26115000

  15. Design optimization of a robust sleeve antenna for hepatic microwave ablation

    International Nuclear Information System (INIS)

    We describe the application of a Bayesian variable-number sample-path (VNSP) optimization algorithm to yield a robust design for a floating sleeve antenna for hepatic microwave ablation. Finite element models are used to generate the electromagnetic (EM) field and thermal distribution in liver given a particular design. Dielectric properties of the tissue are assumed to vary within ± 10% of average properties to simulate the variation among individuals. The Bayesian VNSP algorithm yields an optimal design that is a 14.3% improvement over the original design and is more robust in terms of lesion size, shape and efficiency. Moreover, the Bayesian VNSP algorithm finds an optimal solution saving 68.2% simulation of the evaluations compared to the standard sample-path optimization method

  16. Late results of mucosal proctectomy and colo-anal sleeve anastomosis for chronic irradiation rectal injury

    International Nuclear Information System (INIS)

    Ten patients with severe chronic irradiation injury to the rectum were treated by mucosal proctectomy and colo-anal sleeve anastomosis. The indications were: recurrent rectal bleeding (five), stricture (three), fistula (one) and intractable pain (one). Overall follow-up has ranged from 8 to 77 months (mean 40 months). In the present survivors (n=7) the follow-up ranges from 18 to 77 months (mean 52 months). Six patients have been followed up for more than 3 years and four for more than 5 years. There was no operative mortality. Three anastomotic strictures occurred but the protecting stoma could be closed in all but one patient. Continence was acceptable although urgency and frequency of defaecation were troublesome symptoms. The operation is recommended for life-threatening, haemorrhagic chronic irradiation injury to the rectum. (author)

  17. Application of modern calculation and design methods for bucket wheel sleeve shafts

    Energy Technology Data Exchange (ETDEWEB)

    Moeser, H. (VEB Schwermaschinenbau Lauchhammerwerk, Lauchhammer-Ost (German Democratic Republic))

    1989-01-01

    Explains design of the bucket wheel sleeve shaft for the large SRs 6,300 bucket wheel excavator, built by TAKRAF, GDR. The excavator has a production capacity of 14,500 m{sup 3}/h and a bucket wheel diameter of 17 m. The bucket wheel shaft is 7 m long and weighs 33 t. A scheme of the shaft is provided. The design was developed by computer calculations with the ROSCHA program system of the Dresden Technical University. Shaft groove geometry was determined with the ALPHA program. The shaft was welded from segments that fulfilled requirements of the TGL 19 340 industrial standard. Measurements of load on this bucket wheel shaft and assessment of service life have been made during excavator operations in brown coal surface mines. 5 refs.

  18. Analysis and application of GEWI sleeve weld-ability (Material: C45)

    International Nuclear Information System (INIS)

    Welding may use two kinds of welding process of shielded metal arc welding and CO2 shielded arc welding between inner ring in nuclear island steel lining (material: P265GH) and GEWI sleeve (material:C45).CO2 shielded arc welding is often used because of higher welding efficiency, in particular, in condition of plan press, but quality can come into being some problems if we lack strict measures, for example welding procedure. Shielded metal arc welding control easier quality, but welding efficiency is lower. Comparing and analyzing Weld-ability of C45(Medium carbon Quenched and Tempered Steel.) between of shielded metal arc welding and CO2 shielded arc welding, suggest to use shielded metal arc welding in project practice, and control strict welding procedure measure of pre-heating treatment and Post-heating. (authors)

  19. A possible variant of Bouveret's syndrome presenting as a duodenal stump obstruction by a gallstone after Roux-en-Y gastrectomy: a case report

    Directory of Open Access Journals (Sweden)

    Mittal Shruti

    2009-05-01

    Full Text Available Abstract Introduction Bouveret's syndrome is characterized by gastric outlet obstruction due to a gallstone in the duodenum, usually in association with a cholecystoduodenal fistula. Case presentation We report the case of a 69-year-old Caucasian man who developed duodenal stump obstruction due to an impacted gallstone after having previously undergone Roux-en-Y gastrectomy. Conclusions Duodenal stump obstruction after Roux-en-Y gastrectomy is rare, and may be difficult to manage. Patients who present with upper gastrointestinal or pancreatobiliary pathology after previous gastric surgery should be managed in centres with the availability of appropriate endoscopic and surgical experience.

  20. Early rehabilitation after surgery program versus conventional care during perioperative period in patients undergoing laparoscopic assisted total gastrectomy

    Directory of Open Access Journals (Sweden)

    Manash Ranjan Sahoo

    2014-01-01

    Full Text Available Objective: To evaluate the safety and efficacy of early rehabilitation after surgery program (ERAS in patients undergoing laparoscopic assisted total gastrectomy. Materials And Methods: This is a study where 47 patients who are undergoing lap assisted total gastrectomy are selected. Twenty-two (n = 22 patients received enhanced recovery programme (ERAS management and rest twenty-five (n = 25 conventional management during the perioperative period. The length of postoperative hospital stay, time to passage of first flatus, intraoperative and postoperative complications, readmission rate and 30 day mortality is compared. Serum levels of C-reactive protein pre-operatively and also on post-op day 1 and 3 are compared. Results: Postoperative hospital stay is shorter in ERAS group (78 ± 26 h when compared to conventional group (140 ± 28 h. ERAS group passed flatus earlier than conventional group (37 ± 9 h vs. 74 ± 16 h. There is no significant difference in complications between the two groups. Serum levels of CRP are significantly low in ERAS group in comparison to conventional group. [d1 (52.40 ± 10.43 g/L vs. (73.07 ± 19.32 g/L, d3 (126.10 ± 18.62 g/L vs. (160.72 ± 26.18 g/L]. Conclusion: ERAS in lap-assisted total gastrectomy is safe, feasible and efficient and it can ameliorate post-operative stress and accelerate postoperative rehabilitation in patients with gastric cancer. Short term follow up results are encouraging but we need long term studies to know its long term benefits.

  1. Clinical significance of No. 10 and 11 lymph nodes posterior to the splenic vessel in D2 radical total gastrectomy

    Science.gov (United States)

    Wang, Wei; Xiong, Wenjun; Liu, Zhiwei; Luo, Lijie; Zheng, Yansheng; Tan, Ping; Diao, Dechang; Zou, Liaonan; Wan, Jin

    2016-01-01

    Abstract D2 lymphadenectomy is widely performed for advanced proximal gastric cancer, but complete dissection of No. 10 and 11 lymph nodes (LNs) is technically challenging, especially for those posterior to the splenic vessel. This study aimed to investigate the clinical significance of removing No. 10 and 11 LNs posterior to the splenic vessel in radical total gastrectomy. Between January 2013 and February 2015, 53 patients who underwent spleen-preserving D2 radical total gastrectomy were enrolled. While dissecting No. 10 and 11 LNs, we divided them into 2 parts, namely LNs anterosuperior and posterior to the splenic vessel, and the pathological data were reviewed. Sixteen patients underwent laparoscopy and 37 underwent laparotomy. No mortality was recorded. According to the pathological results, the TNM stages of the tumor were IIA in 11 patients (20.8%), IIB in 5 (9.4%), IIIA in 7 (13.2%), IIIB in 10 (18.9%), and IIIC in 20 (18.9%). The mean number of LNs retrieved was 30.3 ± 12.3. The sum of No. 10 and 11 LNs posterior to the splenic vessel was 59 and the mean number was 1.11 ± 1.47. One LN with metastasis was found in the special 59 regional LNs, and the metastasis rate was 1.9% (1/53). Concerning the low metastasis rate (1.9%) and difficult complete dissection of No. 10 and 11 LNs posterior to the splenic vessel, our initial analysis suggests that the rate of No. 10 and 11 LNs posterior to the splenic vessel metastasis was 1.9%, but further studies are needed to reveal its clinical significance in D2 radical total gastrectomy for advanced proximal gastric cancer. PMID:27512888

  2. Is Gastrectomy-Induced High Turnover of Bone with Hyperosteoidosis and Increase of Mineralization a Typical Osteomalacia?

    OpenAIRE

    Takashi Ueyama; Yuta Yamamoto; Kazuki Ueda; Aiji Yajima; Yoshimasa Maeda; Yasunobu Yamashita; Takao Ito; Yoshihiro Tsuruo; Masao Ichinose

    2013-01-01

    Gastrectomy (GX) is thought to result in osteomalacia due to deficiencies in Vitamin D and Ca. Using a GX rat model, we showed that GX induced high turnover of bone with hyperosteoidosis, prominent increase of mineralization and increased mRNA expression of both osteoclast-derived tartrate-resistant acid phosphatase 5b and osteocalcin. The increased 1, 25(OH)2D3 level and unchanged PTH and calcitonin levels suggested that conventional bone and Ca metabolic pathways were not involved or change...

  3. Preventing prolonged post-operative ileus in gastric cancer patients undergoing gastrectomy and intra-peritoneal chemotherapy

    Institute of Scientific and Technical Information of China (English)

    De-Chuan Chan; Kuo-Liang Shen; Yao-Chi Liu; Cheng-Jueng Chen; Jyh-Cherng Yu; Heng-Cheng Chu; Fa-Chang Chen; Teng-Wei Chen; Huan-Fa Hsieh; Tzu-Ming Chang

    2005-01-01

    AIM: To assess the efficacy of metoclopramide (Met) for prevention of prolonged post-operative ileus in advanced gastric cancer patients undergoing D2 gastrectomy and intra-peritoneal chemotherapy (IPC).METHODS: Thirty-two advanced gastric cancer patients undergoing D2 gastrectomy and IPC were allocated to two groups. Sixteen patients received Met immediately after operation (group A), and 16 did not (group B). Another 16 patients who underwent D2 gastrectomy without IPC were enrolled as the control group (group C). All patients had received epidural pain control. The primary endpoints were time to first post-operative flatus and time until oral feeding with a soft diet without discomfort. Secondary endpoints were early complications during hospitalization.RESULTS: Gender, the type of resection, operating time,blood loss, tumor status and amount of narcotics were connparable in the three groups. However, the group C patients were older than those in groups A and B (67.5±17.7 vs 56.8±13.2, 57.5±11.7 years, P= 0.048). First bowel flatus occurred after 4.35±0.93 d in group A, 4.94±1.37 d in group B, and 4.71±1.22 d in group C (P>0.05). Oral feeding of a soft diet was tolerated 7.21±1.92 d after operation in group A, 10.15±2.17 d in group B, and 7.53±1.35 d in group C(groups A and C vsgroup B, P<0.05). There was no significant difference in respect to the first flatus among the three groups. However, the time of tolerating oral intake with soft food in groups A and C patients was significantly shorter than that in group B patients. Levels of C-reactive protein (CRP) were significantly lower in group C and there was a more prominent and prolonged response in CRP level in patients undergoing IPC. The incidence of post-operative complications was similar in the three groups except for prolonged post-operative ileus. There was no increased risk of anastomotic leakage in patients receiving Met.CONCLUSION: The results suggest that a combination of intravenous

  4. Total gastrectomy for rare refractory gastroparesis in patient with syringomyelia: A good impact on quality of life

    Directory of Open Access Journals (Sweden)

    Maurizio Zizzo

    2015-12-01

    We report a case of a 67-year-old woman with a history of pain in the back-lumbar spine and lower limbs, paresthesia and urinary incontinence. MRI revealed syringomyelia, extended from T3 to the medullary cone. Neurological picture was worsened by progressive and increasingly debilitating gastrointestinal symptoms refractory to dietary changes and medical treatment. Blood tests, gastrointestinal investigations and imaging were all normal apart from scintigraphy which confirmed delayed gastric emptying. The neurological symptoms disappeared after removal of an hemangioblastoma of the medullary cone. The persistent gastroparesis was treated by total gastrectomy with complete resolution of the patient's gastrointestinal symptoms.

  5. Comparison of laparoscopy-assisted and open radical gastrectomy for advanced gastric cancer

    Science.gov (United States)

    Hao, Yingxue; Yu, Peiwu; Qian, Feng; Zhao, Yongliang; Shi, Yan; Tang, Bo; Zeng, Dongzhu; Zhang, Chao

    2016-01-01

    Abstract Laparoscopy-assisted gastrectomy (LAG) has gained international acceptance for the treatment of early gastric cancer (EGC). However, the use of laparoscopic surgery in the management of advanced gastric cancer (AGC) has not attained widespread acceptance. This retrospective large-scale patient study in a single center for minimally invasive surgery assessed the feasibility and safety of LAG for T2 and T3 stage AGC. A total of 628 patients underwent LAG and 579 patients underwent open gastrectomy (OG) from Jan 2004 to Dec 2011. All cases underwent radical lymph node (LN) dissection from D1 to D2+. This study compared short- and long-term results between the 2 groups after stratifying by pTNM stages, including the mean operation time, volume of blood loss, number of harvested LNs, average days of postoperative hospital stay, mean gastrointestinal function recovery time, intra- and post-operative complications, recurrence rate, recurrence site, and 5-year survival curve. Thirty-five patients (5.57%) converted to open procedures in the LAG group. There were no significant differences in retrieved LN number (30.4 ± 13.4 vs 28.1 ± 17.2, P = 0.43), proximal resection margin (PRM) (6.15 ± 1.63 vs 6.09 ± 1.91, P = 0.56), or distal resection margin (DRM) (5.46 ± 1.74 vs 5.40 ± 1.95, P = 0.57) between the LAG and OG groups, respectively. The mean volume of blood loss (154.5 ± 102.6 vs 311.2 ± 118.9 mL, P < 0.001), mean postoperative hospital stay (7.6 ± 2.5 vs 10.7 ± 3.6 days, P < 0.001), mean time for gastrointestinal function recovery (3.3 ± 1.4 vs 3.9 ± 1.5 days, P < 0.001), and postoperative complications rate (6.4% vs 10.5%, P = 0.01) were clearly lower in the LAG group compared to the OG group. However, the recurrence pattern and site were not different between the 2 groups, even they were stratified by the TNM stage. The 5-year overall survival (OS) rates were 85.38%, 79

  6. Effect of intensive vs conventional insulin therapy on perioperative nutritional substrates metabolism in patients undergoing gastrectomy

    Institute of Scientific and Technical Information of China (English)

    Han-Cheng Liu; Yan-Bing Zhou; Dong Chen; Zhao-Jian Niu; Yang Yu

    2012-01-01

    AIM:To investigate the effect of intensive vs conventional insulin therapy on perioperative nutritional substrates metabolism in patients undergoing radical distal gastrectomy.METHODS:Within 24 h of intensive care unit management,patients with gastric cancer were enrolled after written informed consent and randomized to the intensive insulin therapy (IIT) group to keep glucose levels from 4.4 to 6.1 mmol/L or the conventional insulin therapy (CIT) group to keep levels less than 10 mmol/L.Resting energy expenditure (REE),respiratory quotient (RQ),resting energy expenditure per kilogram (REE/kg),and the lipid oxidation rate were monitored by the indirect calorimeter of calcium citrate malate nutrition metabolism investigation system.The changes in body composition were analyzed by multi-frequency bioimpedance analysis.Blood fasting glucose and insulin concentration were measured for assessment of Homeostasis model assessment of insulin resistance.RESULTS:Sixty patients were enrolled.Compared with preoperative baseline,postoperative REE increased by over 22.15% and 11.07%; REE/kg rose up to 27.22 ± 1.33 kcal/kg and 24.72 ± 1.43 kcal/kg; RQ decreased to 0.759 ± 0.034 and 0.791 ± 0.037; the lipid oxidation ratio was up to 78.25% ± 17.74% and 67.13% ± 12.76% supported by parenteral nutrition solutions from 37.56% ± 11.64% at the baseline; the level of Ln-HOMA-IR went up dramatically (P < 0.05,respectively) on postoperative days 1 and 3 in the IIT group.Meanwhile the concentration of total protein,albumin and triglyceride declined significantly on postoperative days 1 and 3 compared with pre-operative levels (P < 0.05,respectively).Compared with the CIT group,IIT reduced the REE/kg level (27.22 ± 1.33 kcal/kg vs 29.97 ± 1.47 kcal/kg,P =0.008; 24.72 ± 1.43 kcal/kg vs 25.66 ± 1.63 kcal/kg,P =0.013); and decreased the Ln-HOMA-IR score (P =0.019,0.028) on postoperative days 1 and 3; IIT decreased the level of CRP on postoperative days 1 and 3 (P

  7. Long-term clinical outcomes of laparoscopy-assisted distal gastrectomy versus open distal gastrectomy for early gastric cancer: A comprehensive systematic review and meta-analysis of randomized control trials.

    Science.gov (United States)

    Lu, Wei; Gao, Jian; Yang, Jingyun; Zhang, Yijian; Lv, Wenjie; Mu, Jiasheng; Dong, Ping; Liu, Yingbin

    2016-07-01

    The objective of this study was to compare long-term surgical outcomes and complications of laparoscopy-assisted distal gastrectomy (LADG) with open distal gastrectomy (ODG) for the treatment of early gastric cancer (EGC) based on a review of available randomized controlled trials (RCTs) evaluated using the Cochrane methodology.RCTs comparing LADG and ODG were identified by a systematic literature search in PubMed, Cochrane Library, MEDLINE, EMBASE, Scopus, and the China Knowledge Resource Integrated Database, for papers published from January 1, 2003 to July 30, 2015. Meta-analyses were performed to compare the long-term clinical outcomes.Our systematic literature search identified 8 eligible RCTs including 732 patients (374 LADGs and 358 ODGs), with low overall risk of bias. Long-term mortality and relapse rate were comparable for both techniques. The long-term complication rate was 8.47% in LADG groups and 13.62% in the ODG group, indicating that LADG was associated with lower risk for long-term complications (RR = 0.63; 95%CI = 0.39-1.00; P = 0.03).In the treatment of EGC, LADG lowered the rate of long- and short-term complications and promoted earlier recovery, with comparable oncological outcomes to ODG. PMID:27399073

  8. Clinical Significance of the Prognostic Nutritional Index for Predicting Short- and Long-Term Surgical Outcomes After Gastrectomy

    Science.gov (United States)

    Lee, Jee Youn; Kim, Hyoung-Il; Kim, You-Na; Hong, Jung Hwa; Alshomimi, Saeed; An, Ji Yeong; Cheong, Jae-Ho; Hyung, Woo Jin; Noh, Sung Hoon; Kim, Choong-Bai

    2016-01-01

    Abstract To evaluate the predictive and prognostic significance of the prognostic nutritional index (PNI) in a large cohort of gastric cancer patients who underwent gastrectomy. Assessing a patient's immune and nutritional status, PNI has been reported as a predictive marker for surgical outcomes in various types of cancer. We retrospectively reviewed data from a prospectively maintained database of 7781 gastric cancer patients who underwent gastrectomy from January 2001 to December 2010 at a single center. From this data, we analyzed clinicopathologic characteristics, PNI, and short- and long-term surgical outcomes for each patient. We used the PNI value for the 10th percentile (46.70) of the study cohort as a cut-off for dividing patients into low and high PNI groups. Regarding short-term outcomes, multivariate analysis showed a low PNI (odds ratio [OR] = 1.505, 95% CI = 1.212–1.869, P the index was not associated with cancer recurrence. PMID:27149460

  9. Simultaneous laparoscopy-assisted low anterior resection and distal gastrectomy for synchronous carcinoma of rectum and stomach

    Institute of Scientific and Technical Information of China (English)

    Qian-Lin Zhu; Feng Dong; Jun-Jun Ma; Ya-Ping Zong; Min-Hua Zheng; Bo Feng; Ai-Guo Lu; Min-Liang Wang; Jian-Wen Li; Wei-Guo Hu; Lu Zang; Zhi-Hai Mao

    2008-01-01

    Laparoscopic resection of rectal cancer or gastric cancer has been advocated for the benefits of a reduced morbidity,a shorter treatment time,and similar outcomes.However,simultaneous laparoscopy-assisted low anterior resection and distal gastrectomy for synchronous carcinoma of rectum and stomach are rarely documented in literature.Endoscopic examination revealed a synchronous carcinoma of rectum and stomach in a 55-year-old male patient with rectal bleeding and epigastric discomfort.He underwent a simultaneous laparoscopy-assisted low anterior resection and distal gastrectomy with regional lymph nodes dissected.The operation time was 270min and the estimated blood loss was 120mL.The patient required parenteral analgesia for less than 24h.Flatus was passed on postoperative day 3,and a solid diet was resumed on postoperative day 7.He was discharged on postoperative day 13.With the advances in laparoscopic technology and experience,simultaneous resection is an attractive alternative to a synchronous gastrointestinal cancer.

  10. Oncologic value of laparoscopy-assisted distal gastrectomy for advanced gastric cancer: A systematic review and meta-analysis

    Science.gov (United States)

    Aurello, Paolo; Sagnotta, Andrea; Terrenato, Irene; Berardi, Giammauro; Nigri, Giuseppe; D'Angelo, Francesco; Ramacciato, Giovanni

    2016-01-01

    BACKGROUND: The oncologic validity of laparoscopic-assisted distal gastrectomy (LADG) in the treatment of advanced gastric cancer (AGC) remains controversial. This study is a systematic review and meta-analysis of the available evidence. MATERIALS AND METHODS: A comprehensive search was performed between 2008 and 2014 to identify comparative studies evaluating morbidity/mortality, oncologic surgery-related outcomes, recurrence and survival rates. Data synthesis and statistical analysis were carried out using RevMan 5.2 software. RESULTS: Eight studies with a total of 1456 patients were included in this analysis. The complication rate was lower in LADG [odds ratio (OR) 0.59; 95% confidence interval (CI) = 0.42-0.83; P 0.05). CONCLUSION: The current study supports the view that LADG for AGC is a feasible, safe and effective procedure in selected patients. Adequate lymphadenectomy, resection margins, recurrence, cancer-related mortality and long-term outcomes appear equivalent to open distal gastrectomy (ODG). PMID:27279389

  11. The usefulness of levin tube inserted drip infusion spiral CT: comparison with conventional method in subtotal gastrectomy patients

    Energy Technology Data Exchange (ETDEWEB)

    Park, Young Jin; Kim, Young Hwan; Yoon, Jung Hee; Cha, Soon Joo; Kim, Jeong Sook [Sanggye Paik Hospital, Seoul (Korea, Republic of); Kim, Sung Rok; Hur, Gham; Rhim, Hyun Chul [Hanyang University Hospital, Seoul (Korea, Republic of)

    1998-04-01

    The purpose of this study is to access the usefulness of newly designed Levin tube inserted drip infusion spiral CT for the evaluation of remnant stomach and anastomosis site in patients who have undergone subtotal gastrectomy for stomach cancer. A new technique named Levin tube inserted drip infusion spiral CT was used to prospectively study 23 patients. A 16Fr Levin tube was inserted into the remnant stomach; 500 ml of tap water was drip infused just before CT scanning and an additional 500 ml of water was infused during IV contrast injection. Water was infused by gravity, using a water bottle suspended at a height of 90 cm (Group A). The 31 patients who underwent conventional spiral CT scanning immediately after the divided ingestion of 900 ml diluted gastrografin were selected as a control group (Group B). The anatomic delineation of the anastomosis site was graded by two radiologists as excellent (3), good(2), fair (1) or poor (0). To evaluate the degree of distension, the maximal diameters of remnant stomach and the anastomosis site, and the thickness of the stomach wall, were also measured. In patients who had undergone subtobal gastrectomy, Levin tube inserted drip infusion spiral CT showed excellent anatomic delineation of the site of anastomosis and remnant stomach. We found that because it increases the distension of remnant stomach and the anastomosis site, this technique is effective for the evaluation of postoperative stomach. (author). 10 refs., 2 tabs., 3 figs.

  12. Manufacture and test of mechanical connections for ceramic heat exchanger tubes/ceramic sleeve-screw connection

    International Nuclear Information System (INIS)

    Goal of the project was the qualification of a mechanical connection for ceramic heat-exchanger tubes made from SiSiC. The tube ends with external screw threads are turned into a ceramic sleeve with internal threads. A flat sealing provides sufficient tightness. Tube compounds of approx. 4.7 m length were manufactured for a solar receiver test panel. In fall/winter 1987/88 the panel was successfully tested under realistic environmental and operational conditions up to 10000C air outlet temperature at the Plataforma Solar in Almeria/Spain, and the ceramic sleeve connection withstood all loads. The work was performed in completion of the German-Spanish Technology Program GAST (Gas-cooled Solar Tower Power Plant) in close cooperation with the companies MAN Technologie and Asinel. (orig.) With 8 refs., 1 tab., 14 figs

  13. The Influence of Splenectomy Performed Simultaneously with Gastrectomy on Postoperative Complications in Patients with Gastric Cancer Undergoing Surgery with the Intention to Treat

    Directory of Open Access Journals (Sweden)

    Głuszek Stanisław

    2014-07-01

    Full Text Available Despite the growing understanding of the pathophysiological processes in the perioperative period and significant advancements in surgical techniques, operative treatment for gastric cancer remains a challenge for surgeons, especially because the primary procedure of total or nearly total gastrectomy must at times be extended by the resection of other organs.

  14. Investigation of the interrelationship of the production operations of oil-well sucker-rod pump sleeves

    Energy Technology Data Exchange (ETDEWEB)

    Kurbanov, A.K.

    1987-03-01

    The authors present a process and a method for its control for the production of oil well rod pump sleeves. The method makes use of regression equations and correlation functions as implemented in a Minsk-32 computer for an online control and inspection system and guarantees the accuracy of various machining operations such as honing and boring as well as nitridation in achieving specified tolerances and size and straightness requirements.

  15. Sleeve bridging of the rhesus monkey ulnar nerve with muscular branches of the pronator teres: multiple amplification of axonal regeneration

    OpenAIRE

    Yu-hui Kou; Pei-xun Zhang; Yan-hua Wang; Bo Chen; Na Han; Feng Xue; Hong-bo Zhang; Xiao-feng Yin; Bao-guo Jiang

    2015-01-01

    Multiple-bud regeneration, i.e., multiple amplification, has been shown to exist in peripheral nerve regeneration. Multiple buds grow towards the distal nerve stump during proximal nerve fiber regeneration. Our previous studies have verified the limit and validity of multiple amplification of peripheral nerve regeneration using small gap sleeve bridging of small donor nerves to repair large receptor nerves in rodents. The present study sought to observe multiple amplification of myelinated ne...

  16. Distribution of fission products in graphite sleeves and blocks of the ninth and tenth OGL-1 fuel assemblies

    International Nuclear Information System (INIS)

    Distribution of fission products in graphite sleeves and blocks of the ninth and tenth OGL-1 fuel assemblies was measured by gamma spectrometry with lathe sectioning. The assemblies were loaded with HTGR fuel compacts, which had been produced by a scaled-up facility for the High Temperature Engineering Test Reactor (HTTR) being developed by JAERI; and they were irradiated in an in-pile gas loop, OGL-1. Fission products detected in the sleeves were 137Cs, 134Cs, 155Eu, 154Eu, 144Ce, 125Sb and 110mAg. The last nuclide, however, may have been produced by activation of a stable isotope, 109Ag, contained as impurity. Effective retention capability of the sleeve was observed for 155Eu, 154Eu, 144Ce and 125Sb; while, not for 137Cs and 134Cs. Concentration of 137Cs in the graphite blocks was markedly higher at the downstream side than at the upstream side of the coolant. This was ascribed to migration of the nuclide with the coolant flow and its subsequent sorption on the surface of the block. (author)

  17. Effects of Prolonged Empirical Antibiotic Administration on Post-Surgical Intestinal Bacterial Flora of Local Dogs Undergoing Non-Laparoscopic Gastrectomy

    Directory of Open Access Journals (Sweden)

    J.F. Akinrinmade

    2015-07-01

    Full Text Available Prolonged post-surgical antibiotic administration may be of less advantage in prevention of post-surgical infections. This study therefore, aimed at investigating the prolonged effect of empiric administration of three most-prescribed antibiotics (amoxicillin, cefotaxime and oxytetracycline by veterinary practices in Southwest Nigeria on intestinal bacterial population of dogs undergoing partial, non-laparoscopic gastrectomy. Using conventional quantitative and qualitative microbial culture procedures, the total bacterial populations were mostly too numerous to count (TNTC before gastrectomy but log103-105 cfu/mL after, while control were log 105-107 cfu/mL after gastrectomy. On general-purpose, special, differential and selective culture media, total bacterial counts with increasing post-operative days were- amoxicillin (11 mg/kg day 4: log 105-10-9/TNTC cfu/mL vs. day 8: log 103-105 cfu/mL; cefotaxime (25 mg/kg day 4: log 103-108/TNTC/cfu/mL vs. day 8: log 102-105 cfu/mL; oxytetracycline (10 mg/kg day 4: log 104-109 TNTC cfu/mL vs. day 8: log 102-106 cfu/mL. Total bacterial counts of control animals were- day 4: log 105-108/TNTC cfu/mL vs. day 8: log 105-109. Total qualitative populations of predominant, easily-recoverable aerobic and anaerobic rectal canine bacteria, Bacillus, Citrobacter aerogenes, Clostridium, E. coli, Klebsiella, Enterobacter, Proteus, Pseudomonas, Salmonella, Shigella, Streptococcus, Staphylococcus and lactobacilli were significantly less after gastrectomy but reductions in post-operative bacterial populations were mostly more pronounced among the anaerobes (lactobacilli and Clostridium perfringens. No post-operative infection was recorded among all the experimental animals, including the control animals. In conclusion, this study confirmed significant reduction effect of prolonged empiric antibiotic administration on rectal (intestinal bacterial populations of experimental local dogs that had partial, non

  18. Rock removal under gas pipeline with expanded cement technique and repair with composite sleeve

    Energy Technology Data Exchange (ETDEWEB)

    Souza Filho, Byron Goncalves de; Frota, Cristiane Souto [PETROBRAS, Rio de Janeiro, RJ (Brazil); Matsuo, Fabio Massatoshi Ferreira [Transportadora Brasileira Gasoduto Bolivia-Brasil (TBG), Rio de Janeiro, RJ (Brazil)

    2009-07-01

    Amid the great challenges of transporting natural gas to the major cities in Brazil, TBG (Transportadora Brasileira Gasoduto Bolivia-Brasil), which owns and operates the largest pipeline in Latin America, with a length of approximately 2,600 km of pipelines (from 32 inches o 16 inches), built between 1998 and 2000 and started commercial operation in July 1999. During its maintenance inspection, using geometric pigs and pigs MFL / Inertial, located a dent in the pipe with approximately 4.7% of deformation with dimensions of 670 mm x 600 mm, caused by accommodation of the pipeline on a rock about 5 m of width. With the pipeline in operation and and 10% lowering the historic pressure, as the internal procedure of the TBG, the rock was removed using the technique of expansive cement, which is to perforate several roles on the rock and then apply the expansive cement which after 24 hours cause cracks, splitting the rock into slabs. The visual, ultrasonic and liquid penetrant inspections were made and repair with sleeve of composite material was achieved. This paper describes the whole methodology and experience of execution, including the results of inspection with pig, removal of the rock with the expansive cement, execution of repair and report photography. (author)

  19. Extended Sleeve Products Allow Control and Monitoring of Process Fluid Flows Inside Shielding, Behind Walls and Beneath Floors - 13041

    International Nuclear Information System (INIS)

    Throughout power generation, delivery and waste remediation, the ability to control process streams in difficult or impossible locations becomes increasingly necessary as the complexity of processes increases. Example applications include radioactive environments, inside concrete installations, buried in dirt, or inside a shielded or insulated pipe. In these situations, it is necessary to implement innovative solutions to tackle such issues as valve maintenance, valve control from remote locations, equipment cleaning in hazardous environments, and flow stream analysis. The Extended Sleeve family of products provides a scalable solution to tackle some of the most challenging applications in hazardous environments which require flow stream control and monitoring. The Extended Sleeve family of products is defined in three groups: Extended Sleeve (ESV), Extended Bonnet (EBV) and Instrument Enclosure (IE). Each of the products provides a variation on the same requirements: to provide access to the internals of a valve, or to monitor the fluid passing through the pipeline through shielding around the process pipe. The shielding can be as simple as a grout filled pipe covering a process pipe or as complex as a concrete deck protecting a room in which the valves and pipes pass through at varying elevations. Extended Sleeves are available between roughly 30 inches and 18 feet of distance between the pipeline centerline and the top of the surface to which it mounts. The Extended Sleeve provides features such as ± 1.5 inches of adjustment between the pipeline and deck location, internal flush capabilities, automatic alignment of the internal components during assembly and integrated actuator mounting pads. The Extended Bonnet is a shorter fixed height version of the Extended Sleeve which has a removable deck flange to facilitate installation through walls, and is delivered fully assembled. The Instrument Enclosure utilizes many of the same components as an Extended Sleeve

  20. Effects of glutamine-containing total parenteral nutrition on phagocytic activity and anabolic hormone response in rats undergoing gastrectomy

    Institute of Scientific and Technical Information of China (English)

    Chen-Hsien Lee; Wan-Chun Chiu; Soul-Chin Chen; Chih-Hsiung Wu; Sung-Ling Yeh

    2005-01-01

    AIM: To investigate the effect of glutamine (Gln)-containing parenteral nutrition on phagocytic activity and to elucidate the possible roles of Gin in the secretion of anabolic hormones and nitrogen balance in rats undergoing a gastrectomy.METHODS: Rats with an internal jugular catheter were divided into 2 experimental groups and received total parenteral nutrition (TPN). The TPN solutions were isonitrogenous and identical in nutrient compositions except for differences in amino acid content. One group received conventional TPN (control), and in the other group, 25%of the total amino acid nitrogen was replaced with Gln.After receiving TPN for 3 d, one-third of the rats in each experimental group were sacrificed as the baseline group.The remaining rats underwent a partial gastrectomy and were killed 1 and 3 d, respectively, after surgery. Plasma,peritoneal lavage fluid (PLF), and urine samples were collected for further analysis.RESULTS: The Gin group had fewer nitrogen losses 1 and 2 d after surgery (d1, 16.6±242.5 vs -233.4±205.9 mg/d,d2, 31.8±238.8 vs-253.4±184.6 mg/d, P<0.05). There were no differences in plasma growth hormone (GH) and insulin-like growth factor-1 levels between the 2 groups before or after surgery. The phagocytic activity of peritoneal macrophages was higher in the Gin group than in the control group 1 d after surgery (4 1185±931 vs 323±201,P<0.05). There were no differences in the phagocytic activities of blood polymorphonuclear neutrophils between the 2 groups at the baseline or on the postoperative days.No significant differences in interleukin-1β or interleukin-6concentrations in PLF were observed between the 2 groups.However, tumor necrosis factor-α level in PLF was significantly lower in the Gin group than in the control group on postoperative d 3.CONCLUSION: TPN supplemented with Gin can improve the nitrogen balance, and enhance macrophage phagocytic activity at the site of injury. However, Gin supplementation has no effect

  1. Tratamento da obesidade mórbida com gastrectomia vertical Treatment of morbid obesity with vertical gastrectomy

    Directory of Open Access Journals (Sweden)

    Alcides José Branco-Filho

    2011-03-01

    Full Text Available RACIONAL: A gastrectomia vertical constitui-se em uma das opções de tratamento para a obesidade mórbida. Com a remoção de parte relevante da grande curvatura gástrica, cria-se um estômago tubular com pequena capacidade volumétrica, dando a característica restritiva à operação. OBJETIVOS: Avaliar os pacientes submetidos à gastrectomia vertical quanto ao gênero, idade, índice de massa corporal, co-morbidades associadas, tempo de internamento e evolução pósoperatória a curto prazo. MÉTODOS: Realizou-se um estudo descritivo e retrospectivo em que foram analisados os prontuários de 114 pacientes obesos mórbidos submetidos à gastrectomia vertical. RESULTADOS: Dos 114 pacientes, 107 (93,8% eram do gênero masculino, sendo que a idade média foi de 38 anos (19 a 55. O índice de massa corporal médio foi de 45,9 kg/m² (35 a 65. O tempo de internamento teve um mínimo de 3 e máximo de 48 dias. A principal co-morbidade associada foi a hipertensão arterial sistêmica (63%. Como evolução pós-operatória, 24 pacientes (21% necessitaram de cuidados em unidade de terapia intensiva e houve um total de quatro óbitos (3,5%. CONCLUSÕES: A gastrectomia vertical constitui-se em método seguro e eficaz para perda de peso em obesos mórbidos, sendo uma técnica cirúrgica com baixa morbimortalidade e bons resultados cirúrgicos imediatos.BACKGROUND: Vertical gastrectomy is an option to morbid obesity treatment.Removing a relevant part of the stomach's great curvature, a gastric tube is created with low volumetric capacity, giving to the operation the restrictive characteristic. AIM: To evaluate the patients submitted to vertical gastrectomy regarding gender, age, body mass index, associated comorbidities, time of hospitalization and evolution on the early postoperative period. METHODS: This was a descriptive and retrospective study that analyzed the medical records of 114 morbidly obese patients submitted to vertical gastrectomy. RESULTS

  2. Distal gastrectomy in pancreaticoduodenectomy is associated with accelerated gastric emptying, enhanced postprandial release of GLP-1, and improved insulin sensitivity

    DEFF Research Database (Denmark)

    Harmuth, Stefan; Wewalka, Marlene; Holst, Jens Juul; Nemecek, Romina; Thalhammer, Sabine; Schmid, Rainer; Sahora, Klaus; Gnant, Michael; Miholić, Johannes

    2014-01-01

    cause of which is unclear. The procedure is carried out with pylorus preservation (PPPD) or with distal gastrectomy (Whipple procedure). Accelerated gastric emptying and ensuing enhanced release of glucagon-like peptide-1 (GLP-1) conceivably play a role in glucose metabolism after PD. It was the purpose...... of this study to shed light on the relationship between gastric emptying, GLP-1 and glycemic control after PPPD and the Whipple procedure. METHODS: A 75-g oral glucose tolerance test was carried out in 13 patients having undergone PPPD and in 13 after the Whipple procedure, median age 61 (range, 32......-estimated insulin resistance (HOMA-IR) and oral glucose insulin sensitivity were calculated from glucose and insulin concentrations. RESULTS: Patients with Whipple procedure as compared to PPPD had accelerated gastric emptying (p = 0.01) which correlated with early (0-30 min) integrated GLP-1 (AUC30; r (2) = 0...

  3. Carbon dioxide pneumothorax occurring during laparoscopy-assisted gastrectomy due to a congenital diaphragmatic defect: a case report.

    Science.gov (United States)

    Park, Hye-Jin; Kim, Duk-Kyung; Yang, Mi-Kyung; Seo, Jeong-Eun; Kwon, Ji-Hye

    2016-02-01

    During laparoscopic surgery, carbon dioxide (CO2) pneumothorax can develop due to a congenital defect in the diaphragm. We present a case of a spontaneous massive left-sided pneumothorax that occurred during laparoscopy-assisted gastrectomy, because of an escape of intraperitoneal CO2 gas, under pressure, into the pleural cavity through a congenital defect in the esophageal hiatus of the left diaphragm. This was confirmed on intraoperative chest radiography and laparoscopic inspection. This CO2 pneumothorax caused tolerable hemodynamic and respiratory consequences, and was rapidly reversible after release of the pneumoperitoneum. Thus, a conservative approach was adopted, and the remainder of the surgery was completed, laparoscopically. Due to the high solubility of CO2 gas and the extra-pulmonary mechanism, CO2 pneumothorax with otherwise hemodynamically stable conditions can be managed by conservative modalities, avoiding unnecessary chest tube insertion or conversion to an open procedure. PMID:26885310

  4. [Continent esoduodenal intubation after total gastrectomy for cancer. An African experience apropos of an initial series of 17 cases].

    Science.gov (United States)

    Ribault, L; Diouf, M B; Faye, M; Sarre, B; Diagne, A L; Morcillo, R; Veillard, J M

    1991-01-01

    On the basis of a series of 17 cases in which GI continuity was restored by a containing esoduodenal intubation, the authors describe the technique, which consists in the approximation of the duodenum opposite the diaphragm. Esophageal intubation in the duodenum, the margins of which have been everted, allows preserving the physiological circuit, producing a new container within 3 months and ensuring an effective protection against reflux. The 17 patients had undergone total gastrectomy for advanced cancer, Gutman's stage II in 80% of all cases and stage III or more in the other 20%. 88% of the tumors were adenocarcinomas. There were no clinical or radiological signs of reflux, and no esophagitis was noted on repeated endoscopies. The postoperative mortality rate was 5.8%. The shortest time lapse is 1 year. PMID:1842947

  5. Treatment of gastric remnant cancer post distal gastrectomy by endoscopic submucosal dissection using an insulation-tipped diathermic knife

    Institute of Scientific and Technical Information of China (English)

    Shoji Hirasaki; Hiromitsu Kanzaki; Minoru Matsubara; Kohei Fujita; Shuji Matsumura; Seiyuu Suzuki

    2008-01-01

    AIM: To evaluate the effectiveness of endoscopic submucosal dissection using an insulation-Upped diathermic knife (IT-ESD) for the treatment of patients with gastric remnant cancer.METHODS: Thirty-two patients with early gastric cancer in the remnant stomach, who underwent distal gastrectomy due to gastric carcinoma, were treated with endoscopic mucosal resection (EMR) or ESD at Sumitomo Besshi Hospital and Shikoku Cancer Center in the 10-year period from January 1998 to December 2007, including 17 patients treated with IT-ESD.Retrospectively, patient backgrounds, the one-piece resection rate, complete resection (CR) rate, operation time, bleeding rate, and perforation rate were compared between patients treated with conventional EMR and those treated with IT-ESD.RESULTS- The CR rate (40% in the EMR group ys 82% in the IT-ESD group) was significantly higher in the IT-ESD group than in the EMR group; however,the operation time was significantly longer for the ITESD group (57.6±31.9 min vs 21.1±12.2 min).No significant differences were found in the rate of underlying cardiopulmonary disease (IT-ESD group, 12% ys EMR group, 13%), one-piece resection rate (100% vs 73%), bleeding rate (18% vs 6.7%), and perforation rate (0% vs 0%) between the two groups.CONCLUSION: IT-ESD appears to be an effective treatment for gastric remnant cancer post distal gastrectomy because of its high CR rate.It is useful for histological confirmation of successful treatment.The long-term outcome needs to be evaluated in the future.

  6. Dietary 2-oxoglutarate mitigates gastrectomy-evoked structural changes in cartilage of female rats.

    Science.gov (United States)

    Dobrowolski, Piotr; Tomaszewska, Ewa; Kurlak, Paulina; Pierzynowski, Stefan G

    2016-01-01

    Gastrectomy (Gx) leads to osteopenia/osteoporosis in humans and animals. However, little is known about the influence of Gx on the cartilage in this regard. Recent studies have demonstrated a protective effect of 2-oxoglutaric acid (2-Ox) on bone and cartilage. Hence, the purpose of this study was to investigate whether 2-Ox can mitigate eventual Gx-induced cartilage impairment. Twenty female Sprague-Dawley rats were subjected to Gx and randomly divided into two groups: Gx + 2-Ox and Gx. Another 20 rats were sham-operated (ShO) and randomly divided into two groups: ShO + 2-Ox and ShO. The daily dose of 2-Ox administered to the rats in the drinking water was 0.43 g per 100 g rat. After eight weeks, rats were euthanized and femora and tibiae were collected. Histology and histomorphometry analyses of the articular cartilage and the growth plate were done. Gx resulted in a 32% (±44.5 femur, ±35.8 tibia) decrease in overall thickness of articular cartilage in both bones (femur: ShO 279.1 ± 48.5 vs. Gx 190.2 ± 38.4 µm, tibia: ShO 222.9 ± 50.3 µm vs. Gx 151.3 ± 52.6 µm) (in some zones up to 58 ± 28.0%), and in the growth plate up to 20% (±22.4) (femur: ShO 243.0 ± 34.0 vs. Gx 207.0 ± 33.7 µm, tibia: ShO 220.0 ± 24.6 µm vs. Gx 171.1 ± 16.1 µm). Gx altered the spatial distribution of thick and thin collagen fibers, and chondrocyte shape and size. 2-Ox administration prevented the reduction in both cartilages thickness (Gx + 2-Ox: articular cartilage 265.2 ± 53.8 µm, 235.6 ± 42.7 µm, growth plate 236.7 ± 39.2 µm, 191.3 ± 16.5 µm in femur and tibia, respectively), and abolished the spatial changes in collagen distribution and structure induced by Gx. Gx affects cartilage structure and thickness, however, 2-Ox administration mitigates these effects and showed protective and stimulatory properties. Our observations suggest that dietary 2-Ox can be used to offset

  7. Wear Resistance of Piston Sleeve Made of Layered Material Structure: MMC A356R, Anti-Abrasion Layer and FGM Interface

    Directory of Open Access Journals (Sweden)

    Hernik Szymon

    2016-09-01

    Full Text Available The aim of this paper is the numerical analysis of the one of main part of car engine – piston sleeve. The first example is for piston sleeve made of metal matrix composite (MMC A356R. The second improved material structure is layered. Both of them are comparison to the classical structure of piston sleeve made of Cr-Ni stainless steel. The layered material structure contains the anti-abrasion layer at the inner surface of piston sleeve, where the contact and friction is highest, FGM (functionally graded material interface and the layer of virgin material on the outer surface made of A356R. The complex thermo-elastic model with Archard's condition as a wear law is proposed. The piston sleeve is modelling as a thin walled cylindrical axisymmetric shell. The coupled between the formulation of thermo-elasticity of cylindrical axisymmetric shell and the Archard’s law with functionally changes of local hardness is proposed.

  8. Perioperative analgesic requirements in severely obese adolescents and young adults undergoing laparoscopic versus robotic-assisted gastric sleeve resection

    Directory of Open Access Journals (Sweden)

    Anita Joselyn

    2015-01-01

    Full Text Available Purpose: One of the major advantages for patients undergoing minimally invasive surgery as compared to an open surgical procedure is the improved recovery profile and decreased opioid requirements in the perioperative period. There are no definitive studies comparing the analgesic requirements in patients undergoing two different types of minimally invasive procedure. This study retrospectively compares the perioperative analgesic requirements in severely obese adolescents and young adults undergoing laparoscopic versus robotic-assisted, laparoscopic gastric sleeve resection. Materials and Methods: With Institutional Review Board approval, the medication administration records of all severely obese patients who underwent gastric sleeve resection were retrospectively reviewed. Intra-operative analgesic and adjuvant medications administered, postoperative analgesic requirements, and visual analog pain scores were compared between those undergoing a laparoscopic procedure versus a robotic-assisted procedure. Results: This study cohort included a total of 28 patients who underwent gastric sleeve resection surgery with 14 patients in the laparoscopic group and 14 patients in the robotic-assisted group. Intra-operative adjuvant administration of both intravenous acetaminophen and ketorolac was similar in both groups. Patients in the robotic-assisted group required significantly less opioid during the intra-operative period as compared to patients in the laparoscopic group (0.15 ± 0.08 mg/kg vs. 0.19 ± 0.06 mg/kg morphine, P = 0.024. Cumulative opioid requirements for the first 72 postoperative h were similar in both the groups (0.64 ± 0.25 vs. 0.68 ± 0.27 mg/kg morphine, P = NS. No difference was noted in the postoperative pain scores. Conclusion: Although intraoperative opioid administration was lower in the robotic-assisted group, the postoperative opioid requirements, and the postoperative pain scores were similar in both groups.

  9. Development of sleeve type wired balance%套筒式张线天平的研制

    Institute of Scientific and Technical Information of China (English)

    张平; 赵长辉; 刘博宇

    2012-01-01

    According to the special requirements for aerodynamic loads tests of a civil aircraft model in wind tunnel, a wired balance of sleeve type is developed. This paper describes the encountered difficulties, the solution of key technology and the research results. The balance components are placed on the outer sleeve of 58mm in diameter, the diameter of inner rod is 44mm, and the outer sleeve and inner rod are joined together by welding around wedges. The components of normal force, pitching moment and rolling moment are pulled or pressed, the components deformation of side force and yaw moment are in 'S' types, and the component of axial force is deformed by bending. The supporting part on the components is pulled or pressed and has a good rigidity. By FEM, the strains of normal force and pitching moment are consistent with the calibration outputs. The test result shows that: the design of wired balance is reasonable, the system has a good rigidity composed of the outer sleeve and inner rod and wired support, and the measurement accuracy of each component of the balance is high.%根据民机张线测力试验的特殊要求,研制了一台套筒结构形式的张线天平.详细介绍了该天平在研制中遇到的难点、关键技术的解决措施以及研制的结果.天平元件布置在φ58mm的外套筒上,内杆直径为φ44mm,外套筒和内杆通过楔块焊接在一起.法向力、俯仰力矩和滚转力矩为拉压变形,横向力和偏航力矩为“S”形变形,轴向力为弯曲变形,元件支撑部分受拉压变形且刚度较强.通过对天平进行有限元分析,在法向力和俯仰力矩作用下,得出的应变结果与实际输出基本吻合.风洞试验结果表明:天平设计合理,天平外套筒、内杆及张线支撑系统刚度好,天平各分量测量精度高.

  10. [Esophagojejunal anastomoses with the EEA stapler after total gastrectomy. Technic and immediate results apropos of a recent series of 32 cases].

    Science.gov (United States)

    Le Treut, Y P; Delpero, J R; Sabiani, P; Berthet, B; Bozon-Verduraz, E; Pol, B; Bricot, R

    1987-12-01

    32 consecutive total gastrectomies for cancer (20 extended total gastrectomies) were carried out through an abdominal approach. Reconstruction using a Rouxen-Y loop (28 cases) or an interposed jejunal loop (four cases) was done with an EEA stapled oesophago jejunostomy: 25 end to side and 5 end to end anastomosis were performed and two technical failures led to complete manual anastomosis. All patients have had post-operative X-ray examination: there was no anastomotic leakage in this series, even in the 3 patients (10%) who have died during the post-operative course. A critical study of this series and eight others one from elsewhere is presented: it is concluded that the stapling device allows an easier and safer oesophagojejunostomy than manual procedure, when great care is taken of technical details. PMID:3436987

  11. Finite element calculation and direct x-ray diffraction measurement of residual stresses induced by an hydraulic expansion in steam generator tubes during the sleeving process

    International Nuclear Information System (INIS)

    When installing an internal sleeve to repair a steam generator tube, it is usual to expand the sleeve locally by means of an internal pressure, in order to put it into contact with the tube before welding. This process induces residual stresses in the parent tube, near the end of the contact zone, even if the residual bulging is very small. This study is aimed at assessing the residual stresses as a function of that bulging and of the respective mechanical properties of the materials. An analytical approach based on finite element calculations and an experimental one by x-ray diffraction have been used to evaluate the residual stresses

  12. Using a guide template with a handpiece sleeve to locate the abutment screw position of a cement-retained implant restoration.

    Science.gov (United States)

    Kang, Hye-Won; Lee, Du-Hyeong

    2015-09-01

    The existing techniques for drilling a screw access hole in cement-retained restorations are limited by inaccurate drill guidance and ineffective cooling of the drilling area. An approach for fabricating a guide template to provide screw retrievability using computer-aided design and computer-aided manufacturing (CAD/CAM) is described. A handpiece sleeve was made by 3-dimensional printing and incorporating it into a vacuum-formed template. The handpiece sleeve not only guides the head of the handpiece accurately but also enables the cooling water to reach the area of drilling directly. PMID:26013071

  13. Short-term effects of supplementary feeding with enteral nutrition via jejunostomy catheter on post-gastrectomy gastric cancer patients

    Institute of Scientific and Technical Information of China (English)

    WU Quan; YU Jian-chun; KANG Wei-ming; MA Zhi-qiang

    2011-01-01

    Background Most gastric cancer patients who undergo gastrectomy develop malnutrition.It is,therefore,crucial to establish an effective means to provide nutrition for these patients.To perform home enteral nutrition (EN) to ensure adequate nutritional intake in gastric cancer patients,we placed a jejunostomy catheter during gastric surgery.Most patients showed improved nutritional status.Methods Twenty-nine inpatients at our hospital underwent radical gastrectomy and jejunostomy from December 2002 to December 2007 and were designated as the jejunostomy group,and 32 matched patients without a jejunostomy tube were designated as the tube-free group.The jejunostomy group was treated with EN from 72 hours to 3 months postoperatively.The tube-free group did not receive EN.Data including preoperative and postoperative body weight,body mass index (BMI),nutrition risk screening (NRS) score,Karnofsky performance score (KPS),and laboratory biochemical indicators were documented respectively and compared.Results Compared with preoperative week 1,both groups showed decreased body weight and BMI at 3 months postoperatively.The weight loss in the jejunostomy group ((7.1±3.3) kg) was significantly less than that in the tube-free group ((9.9±3.1) kg).Similarly,BMI decreased by (2.4+1.0) kg/m2 in the jejunostomy group,which was significantly less than in the tube-free group ((3.2±0.9) kg/m2).The number of patients with postoperative NRS ≥3 was decreased in the jejunostomy group,but was increased in the tube-free group,and this difference was significant.There were no significant differences between the two groups in total lymphocyte count,hemoglobin,albumin and prealbumin,and adverse drug effects.Conclusions Short-term (3 months) EN supplementation via jejunostomy tube can reduce the risk of malnutrition and weight loss,and improve tolerance of chemotherapy.Tube feeding is reliable for achieving these goals because it is not important whether or not the patients have appetites.

  14. Is gastrectomy-induced high turnover of bone with hyperosteoidosis and increase of mineralization a typical osteomalacia?

    Directory of Open Access Journals (Sweden)

    Takashi Ueyama

    Full Text Available Gastrectomy (GX is thought to result in osteomalacia due to deficiencies in Vitamin D and Ca. Using a GX rat model, we showed that GX induced high turnover of bone with hyperosteoidosis, prominent increase of mineralization and increased mRNA expression of both osteoclast-derived tartrate-resistant acid phosphatase 5b and osteocalcin. The increased 1, 25(OH2D3 level and unchanged PTH and calcitonin levels suggested that conventional bone and Ca metabolic pathways were not involved or changed in compensation. Thus, GX-induced bone pathology was different from a typical osteomalacia. Gene expression profiles through microarray analysis and data mining using Ingenuity Pathway Analysis indicated that 612 genes were up-regulated and 1,097 genes were down-regulated in the GX bone. These genes were related functionally to connective tissue development, skeletal and muscular system development and function, Ca signaling and the role of osteoblasts, osteoclasts and chondrocytes. Network analysis indicated 9 genes (Aldehyde dehydrogenase 1 family, member A1; Aquaporin 9; Interleukin 1 receptor accessory protein; Very low density lipoprotein receptor; Periostin, osteoblast specific factor; Aggrecan; Gremlin 1; Angiopoietin-like 4; Wingless-type MMTV integration site family, member 10B were hubs connected with tissue development and immunological diseases. These results suggest that chronic systemic inflammation might underlie the GX-induced pathological changes in bone.

  15. Increased expression of C-C motif ligand 2 associates with poor prognosis in patients with gastric cancer after gastrectomy.

    Science.gov (United States)

    Liu, Hao; Shen, Zhenbin; Wang, Xuefei; Zhang, Heng; Qin, Jing; Qin, Xinyu; Xu, Jiejie; Sun, Yihong

    2016-03-01

    Previous studies have demonstrated the clinical significance of polarized tumor-associated macrophages (TAMs) in gastric cancer whereas the cytokines orchestrating TAM polarization remain elusive. This study aims to evaluate the prognostic value of C-C motif ligand 2 (CCL2) expression in gastric cancer patients after surgery. We examined CCL2 expression in tumor tissues by immunohistochemical staining in retrospectively enrolled 414 gastric cancer patients receiving gastrectomy at Zhongshan Hospital during 2008. We used Kaplan-Meier analysis and Cox regression models to assess the prognostic value of CCL2 expression. We generated a predictive nomogram from integrating CCL2 expression with the TNM staging system to evaluate 3- and 5-year overall survival. High intratumor CCL2 expression associated with adverse clinical outcome. Intratumor CCL2 expression provided additional prognostic value in gastric cancer patients. CCL2 expression, as well as well-established TNM staging parameters, was identified as independent prognostic factor for overall survival. The generated nomogram corresponded well with the ideal model in predicting the 3- and 5-year overall survival of gastric cancer patients. CCL2, an identified potential independent adverse prognosticator, could be integrated with TNM staging system to improve the predictive accuracy for overall survival in gastric cancer patients especially with advanced stages. PMID:26438062

  16. Band structure of semiconductors

    CERN Document Server

    Tsidilkovski, I M

    2013-01-01

    Band Structure of Semiconductors provides a review of the theoretical and experimental methods of investigating band structure and an analysis of the results of the developments in this field. The book presents the problems, methods, and applications in the study of band structure. Topics on the computational methods of band structure; band structures of important semiconducting materials; behavior of an electron in a perturbed periodic field; effective masses and g-factors for the most commonly encountered band structures; and the treatment of cyclotron resonance, Shubnikov-de Haas oscillatio

  17. Photonic band gap materials

    International Nuclear Information System (INIS)

    An overview of the theoretical and experimental efforts in obtaining a photonic band gap, a frequency band in three-dimensional dielectric structures in which electromagnetic waves are forbidden, is presented

  18. 铝硅合金套筒裂纹修复%Repairing of Aluminum-silicon Alloy Sleeve Crack

    Institute of Scientific and Technical Information of China (English)

    柯娜; 邵洪波

    2013-01-01

    This article summarizes the experience and technical measures of aluminum-silicon alloy sleeve crack repairing. The successful repairing is ensured by measures of defect location, segmented elimination, preheating, improving the stress condition of the repairing welding line and segmented welding.%本文总结介绍了铝硅合金套筒裂纹返修的经验和技术措施。主要叙述了从缺陷的定位、分段清除、预热、改善返修焊缝处的受力状态、分段焊接等措施,保证返修的成功率。

  19. [Reconstruction of the intestinal tract by intracolonic ileal sleeve. An experimental study and 1st clinical cases].

    Science.gov (United States)

    Vayre, P; Veillard, J M; Gangner, Y; Chomette, G; Jost, J L; Ribault, L; Keilani, K

    1991-01-01

    An experimental study on 15 piglets allowed defining the technical procedure and controlling the anatomical and functional results of various modes of restoration of the ileocolic tract after resection with a terminolateral tubing including and intracolic ileal sleeve. Coloileal fixation was ensured only by a few seromuscular sutures and adhesion with "Tissucol". The clinical application of this procedure was very satisfactory for 9 recent right colectomies, thus confirming the results previously observed for 33 ileal perforations in Africa. The ileocolic tubing technique is easy, reliable, morbidity-free, and causes no leakage of intestinal fluid, no intestinal ischemia and no stenosis. As it prevents coloileal reflux, this assembly may prevent ileitis after right colectomy. Its valvular effect also contributes in the mechanical regulation of transit. The assembly produces a system that can be compared to the ileocecal valve. PMID:1817828

  20. The behaviour of CAGR moderator and sleeve graphites radiolytically oxidised to high weight loss in inhibited coolant gas compositions

    International Nuclear Information System (INIS)

    Gilsocarbon graphites were irradiated to high weight losses in three different CO2 based coolants. The experimental data is tested against a model which interprets the gas phase chemistry and pore geometry and allows weight loss and gas flow properties to be calculated. The observed changes of oxidation rate with dose were successfully predicted from the model. An empirical relationship was also derived which was shown to fit data for moderator, sleeve and special pore structure graphites. Changes in graphite permeability and diffusivity were predicted by the model, and also by other simplified, more approximate methods. The model based upon the measured transport pore spectrum was shown to be the best with other methods proving adequate to moderate doses. (author)

  1. Sleeve bridging of the rhesus monkey ulnar nerve with muscular branches of the pronator teres: multiple amplification of axonal regeneration

    Directory of Open Access Journals (Sweden)

    Yu-hui Kou

    2015-01-01

    Full Text Available Multiple-bud regeneration, i.e., multiple amplification, has been shown to exist in peripheral nerve regeneration. Multiple buds grow towards the distal nerve stump during proximal nerve fiber regeneration. Our previous studies have verified the limit and validity of multiple amplification of peripheral nerve regeneration using small gap sleeve bridging of small donor nerves to repair large receptor nerves in rodents. The present study sought to observe multiple amplification of myelinated nerve fiber regeneration in the primate peripheral nerve. Rhesus monkey models of distal ulnar nerve defects were established and repaired using muscular branches of the right forearm pronator teres. Proximal muscular branches of the pronator teres were sutured into the distal ulnar nerve using the small gap sleeve bridging method. At 6 months after suture, two-finger flexion and mild wrist flexion were restored in the ulnar-sided injured limbs of rhesus monkey. Neurophysiological examination showed that motor nerve conduction velocity reached 22.63 ± 6.34 m/s on the affected side of rhesus monkey. Osmium tetroxide staining demonstrated that the number of myelinated nerve fibers was 1,657 ± 652 in the branches of pronator teres of donor, and 2,661 ± 843 in the repaired ulnar nerve. The rate of multiple amplification of regenerating myelinated nerve fibers was 1.61. These data showed that when muscular branches of the pronator teres were used to repair ulnar nerve in primates, effective regeneration was observed in regenerating nerve fibers, and functions of the injured ulnar nerve were restored to a certain extent. Moreover, multiple amplification was subsequently detected in ulnar nerve axons.

  2. Kinesiology Tape or Compression Sleeve Applied to the Thigh Does Not Improve Balance or Muscle Activation Before or Following Fatigue.

    Science.gov (United States)

    Cavanaugh, M Tyler; Quigley, Patrick J; Hodgson, Daniel D; Reid, Jonathan C; Behm, David G

    2016-07-01

    Cavanaugh, MT, Quigley, PJ, Hodgson, DD, Reid, JC, and Behm, DG. Kinesiology tape or compression sleeve applied to the thigh does not improve balance or muscle activation before or following fatigue. J Strength Cond Res 30(7): 1992-2000, 2016-Compression sleeves (CS) and kinesiology tape (KT) are purported to enhance proprioception, however, there is substantial conflict in the literature. Because the beneficial effects of CS and KT are more evident in the literature with recovery, the objective of this study was to examine the effects of CS and KT on balance under acute nonfatigued and postfatigued conditions. Using a within-subject, repeated-measures design, 12 university participants (5 females and 7 males) performed in a random order CS, KT, and Control conditions. Two trials of each test were conducted before the application of CS or KT (pretest 1), immediately after the application (pretest 2), with posttests at 1 and 10 minutes after 4 sets of unilateral Bulgarian squats to failure (1 minute rest between sets). Tests included a Y balance test (measures: distance reached by nondominant foot in anterior, posterior lateral, and posterior medial directions) and drop jump landing balance test from a 50-cm platform (measures: ground reaction force, electromyography, and center of pressure). The fatigue protocol induced 25.3% decrease in unilateral squat repetitions from set 1 to set 4. There were no significant condition main effects or interactions for any balance measure or EMG before or after fatigue. In conclusion, independent of fatigue, there was no significant effect of CS or KT on balance outcomes immediately and up to 10 minutes following the fatiguing intervention. Thus, nonfatigued or muscles weakened by fatigue did not benefit from CS and KT application. PMID:26705066

  3. Band parameters of phosphorene

    DEFF Research Database (Denmark)

    Lew Yan Voon, L. C.; Wang, J.; Zhang, Y.;

    2015-01-01

    Phosphorene is a two-dimensional nanomaterial with a direct band-gap at the Brillouin zone center. In this paper, we present a recently derived effective-mass theory of the band structure in the presence of strain and electric field, based upon group theory. Band parameters for this theory are co...

  4. Flat Band Quastiperiodic Lattices

    Science.gov (United States)

    Bodyfelt, Joshua; Flach, Sergej; Danieli, Carlo

    2014-03-01

    Translationally invariant lattices with flat bands (FB) in their band structure possess irreducible compact localized flat band states, which can be understood through local rotation to a Fano structure. We present extension of these quasi-1D FB structures under incommensurate lattices, reporting on the FB effects to the Metal-Insulator Transition.

  5. The changing of serum vitamin B12 and homocysteine levels after gastrectomy in patients with gastric cancer: do they associate with clinicopathological factors?

    Science.gov (United States)

    Bilici, Ahmet; Sonkaya, Alper; Ercan, Serif; Ustaalioglu, Bala Basak Oven; Seker, Mesut; Aliustaoglu, Mehmet; Orcun, Asuman; Gumus, Mahmut

    2015-02-01

    After total (TG) or distal subtotal gastrectomy (DG), patients are at high risk of vitamin B12 (vit-B12) deficiency, which results in elevation of homocysteine levels. The changing of serum vit-B12 and homocysteine levels in patients with gastric cancer is not well known. Seventy-two patients with gastric cancer who had undergone currative gastrectomy and 50 healthy controls were included. Serum vit-B12 and homocysteine levels were analyzed in gastric cancer patients. In addition, these parameters were compared with those of healthy control subjects. While serum vit-B12 levels in gastrectomized patients were significantly lower than that of healthy controls (221.8 ± 125.6 pg/mL vs. 309.9 ± 174.3 pg/mL, p = 0.002), homocysteine levels were significantly higher in patients with gastric cancer (14.2 ± 6.7 μmol/L vs. 12.5 ± 6.1 μmol/L, p = 0.016). Mean serum folate level was found to be high in healthy controls (7.3 ng/mL) compared to patients (9.2 ng/mL, p = 0.027). Out of 72 patients, 40 patients (55.6 %) with gastric cancer developed vit-B12 deficiency after gastrectomy. Vit-B12 deficiency was found to be related with gastrectomy type (p = 0.02) and homocysteine levels (p = 0.014). In patients who underwent TG, the incidence of vit-B12 deficiency was significantly higher compared with those with DG (67.5 vs. 32.5 %). In addition, serum vit-B12 level in patients with DG was significantly higher than that of patients with TG (248.3 ± 122.0 pg/mL vs. 200.8 ± 126.7 pg/mL, p = 0.041), whereas homocysteine levels were significantly lower in DG group compared with TG group (12.1 ± 6.1 μmol/L vs. 15.8 ± 6.9 μmol/L, p = 0.014). A logistic regression analysis showed that the extent of gastrectomy was found to be an independent factor for predicting the occurrence of vit-B12 deficiency (p vit-B12 deficiency rate was significantly higher after TG compared with that after DG, while homocysteine levels were

  6. Fast-track surgery protocol in elderly patients undergoing laparoscopic radical gastrectomy for gastric cancer: a randomized controlled trial

    Directory of Open Access Journals (Sweden)

    Liu G

    2016-06-01

    Full Text Available Guozheng Liu,1 Fengguo Jian,2 Xiuqin Wang,2 Lin Chen1 1Department of General Surgery, Chinese PLA General Hospital, Beijing, People’s Republic of China; 2Second Department of General Surgery, Changyi People’s Hospital, Shandong, People’s Republic of China Aim: To study the efficacy of the fast-track surgery (FTS program combined with laparoscopic radical gastrectomy for elderly gastric cancer (GC patients.Methods: Eighty-four elderly patients diagnosed with GC between September 2014 and August 2015 were recruited to participate in this study and were divided into four groups randomly based on the random number table as follows: FTS + laparoscopic group (Group A, n=21, FTS + laparotomy group (Group B, n=21, conventional perioperative care (CC + laparoscopic group (Group C, n=21, and CC + laparotomy group (Group D, n=21. Observation indicators include intrasurgery indicators, postoperative recovery indicators, nutritional status indicators, and systemic stress response indicators.Results: Preoperative and intraoperative baseline characteristics showed no significant differences between patients in each group (P>0.05. There were no significant differences between each group in nausea and vomiting, intestinal obstruction, urinary retention, incision infection, pulmonary infection, and urinary tract infection after operation (P>0.05. Time of first flatus and postoperative hospital stay time of FTS Group A were the shortest, and total medical cost of this group was the lowest. For all groups, serum albumin, prealbumin, and transferrin significantly decreased, while CRP and interleukin 6 were significantly increased postoperative day 1. From postoperative day 4–7, all indicators of the four groups gradually recovered, but compared with other three groups, those of Group A recovered fastest.Conclusion: FTS combined with laparoscopic surgery can promote faster postoperative recovery, improve early postoperative nutritional status, and more

  7. One-man band

    OpenAIRE

    Stillman, R.

    2013-01-01

    This website presents practice-based research related to solo simultaneous instrumental performance ('one-man band'). The site was conceived as a creative and widely accessible platform for music and ideas resulting from one-man band activates carried out between 2008 and 2013. Central to this project is an interest in how one-man band technique informs compositional process, including studio production. Through presentation and analysis of the author’s own creative practice, the site exp...

  8. On construction technique for straight screw thread sleeve connection%直螺纹套筒连接施工技术

    Institute of Scientific and Technical Information of China (English)

    王兆莉

    2012-01-01

    Combining the engineering examples, the paper briefly introduces the key technical points in the straight screw thread sleeve connection, including the splice processing, the reinforced steel connection, and so on, and points out the features for the reinforced steel straight screw thread sleeve connection, such as the convenient construction, reliable connection quality, no open fire and pollution, so it has extensive application perspective.%结合工程实例,简要介绍了直螺纹套筒连接中丝头加工、钢筋连接等关键技术要点,并指出钢筋直螺纹套筒连接技术具有施工方便、连接质量可靠、无明火、无污染等特点,有广泛的应用前景。

  9. 巧用钢筋直螺纹套筒连接技术%Using Rebar Straight Thread Sleeve Connecting Technology

    Institute of Scientific and Technical Information of China (English)

    曾良雄; 王艺颖

    2012-01-01

    The paper used Rebar Straight Thread Sleeve Connecting Technology promoted by the Ministry of Construction and the steel scrap in site to process a set group of sleeves to be embed in the concrete wall and change the connections from of ladder and concrete wall from welding to bolt, which improved the speed of construction and ensured the construction quality and safety.%采用建设部推广的钢筋直螺纹套筒连接技术,利用工地的钢筋废料,加工成为一组组套筒,预埋于混凝土筒壁中,将爬梯与混凝土筒壁的惯用连接方式由焊接改为螺栓连接,提高了施工速度,保证了施工质量和人员安全.

  10. Synthesis and electrochemical performances of ZnO/MnO2 sea urchin-like sleeve array as anode materials for lithium-ion batteries

    International Nuclear Information System (INIS)

    MnO2 is electrodeposited onto ZnO nanorod array grown on Ni foil, forming a binder-free ZnO/MnO2 composited electrode. XRD, EDS, SEM and TEM are used to analyze the phase and microstructure of this composite. Burr-like MnO2 nanoflakes grows on ZnO nanorod array, the top of the composite is hollow and at the bottom exists ZnO large block core as an internal support, forming ZnO/MnO2 sea urchin-like sleeve array. As anode material for lithium ion batteries, ZnO/MnO2 sleeve array exhibits higher discharge capacity and coulombic efficiency, better rate performance and cycling stability than single ZnO nanorod array or directly electrodepsited MnO2, and the composite effect is very remarkable. After 100 cycles, the discharge capacity of ZnO/MnO2 still reaches 1259 mA h g−1, and coulombic efficiency surpasses 98%, higher than those of ZnO nanorod array (111 mA h g−1) and directly electrodeposited MnO2 (507 mA h g−1). The improvement of the electrochemical performances is due to the unique sea urchin-like sleeve array architecture. MnO2 burr tube shell structure leads to high electrochemical activity while the internal ZnO core support ensures good structure stability. The gradually opening of sea urchin-like sleeve during the cycling further enhances the electrochemical activity of MnO2, stabilizing and increasing electrochemical performances of the ZnO/MnO2 composite

  11. Subtotal Gastrectomy With Billroth II Anastomosis Is Associated With a Low Risk of Ischemic Stroke in Peptic Ulcer Disease Patients

    Science.gov (United States)

    Chen, Chien-Hua; Lin, Cheng-Li; Kao, Chia-Hung

    2016-01-01

    Abstract Duodenal diversion can ameliorate lipid and glucose metabolism. We assessed the risk of stroke after subtotal gastrectomy with Billroth II anastomosis (SGBIIA) in peptic ulcer disease (PUD). We identified 6425 patients who received SGBIIA for PUD between 1998 and 2010 from the Taiwan National Health Insurance Research Database as the study cohort; we frequency-matched them with 25,602 randomly selected controls from the PUD population who did not receive SGBIIA according to age, sex, index year, and comorbidities including hypertension, diabetes mellitus, hyperlipidemia, coronary artery disease, congestive heart failure, chronic kidney disease, chronic obstructive pulmonary disease (COPD), and obesity. All patients were followed until the end of 2011 to determine the incidence of stroke. The incidence of stroke was lower in patients in the SGBIIA cohort than in those in the non-SGBIIA cohort (18.9 vs 22.9 per 1000 person-years, adjusted hazard ratio [aHR] 0.80, 95% confidence interval [CI] 0.72–0.89, P < 0.001). The risk of ischemic stroke (aHR 0.77, 95% CI 0.69–0.86, P < 0.001), rather than hemorrhagic stroke (aHR 1.00, 95% CI 0.78–1.28), was lower for the SGBIIA cohort than for the non-SGBIIA cohort according to the multivariable Cox proportional hazard regression analysis. The relative risk of ischemic stroke after SGBIIA was lower in men (aHR 0.77, 95% CI 0.69–0.86) than in women (aHR 0.80, 95% CI 0.65–0.99) and in patients aged ≥65 years (aHR 0.72, 95% CI 0.63–0.81) than in those of other age groups (≤49 years, aHR 0.82, 95% CI 0.48–1.39; 50–64 years, aHR 1.01, 95% CI 0.79–1.28). The relative risk of ischemic stroke after SGBIIA was also reduced in patients with comorbidities (aHR 0.84, 5% CI 0.75–0.95) rather than in those without comorbidities (aHR 0.81, 95% CI 0.59–1.12). SGBIIA is associated with a low risk of ischemic stroke for PUD patients, and its protective effect is prominent in men, patients aged ≥65

  12. Significance of modified Lawrence's reconstuction procedures following total gastrectomy for gastric cancer%全胃切除改良Lawrence法消化道重建的意义

    Institute of Scientific and Technical Information of China (English)

    邹小明; 宋茂力; 聂刚; 李刚; 佟佰峰; 姜浩

    2011-01-01

    目的 探讨胃癌全胃切除术改良Lawrence法消化道重建对患者营养吸收的影响.方法 对76例全胃切除患者,行改良Lawrence法消化道重建3个月和6个月的营养状况及消化道症状进行回顾性分析.结果 76例患者中48例患者于术后3个月行钡餐检查,钡剂排空时间为60~100 min,站立位与平卧位均未见钡剂反流入食管,无吻合口狭窄的征象.分别于术后3个月和6个月复查血红蛋白、总蛋白、体重、进食量,均达到或接近术前水平.结论 该术式使患者在术后短期内恢复正常饮食习惯,手术操作简便、安全,是全胃切除术后一种理想的消化道重建术式.%Objective To explore the influence of modified Lawrence's reconstuction procedures following total gastrectomy for gastric cancer to alimentation of patients. Methods Retrospective analysis of nutritional status and symptoms of digestive tract in 76 patiens of total gastrectomy for gastric cancer while 3 and 6 month after modified Lawrence's reconstuction procedure. Results Examination was given in 48 patients 3 month after operation. Emptying time of barium was 60-100 min, barium meal backflowing to esophagus was not observed in all patients when they were in erect or decubitus position, no sign of narrow of anastomotic stoma. The hemoglobin, total protein, body weight and food-intake of patients 3 or 6 months after operation was as same as them before operation. Conclusion The patients undergoing this reconstuction procedure will recover normal food habits soon after operation, Lawrence's reconstuction procedures is a satisfactory choice in patients of total gastrectomy for gastric cancer because of its safety and convenient.

  13. Laparoscopic gastric banding

    Science.gov (United States)

    ... make the band tighter or looser any time after you have this surgery. It may be tightened or ... Having problems eating Not losing enough weight Vomiting after you eat Outlook (Prognosis) The final weight loss with ...

  14. CSF oligoclonal banding - slideshow

    Science.gov (United States)

    ... presentations/100145.htm CSF oligoclonal banding - series—Normal anatomy ... Overview The cerebrospinal fluid (CSF) serves to supply nutrients to the central nervous system (CNS) and collect waste products, as well as ...

  15. The Band Pass Filter

    OpenAIRE

    Christiano, Lawrence J.; Terry J. Fitzgerald

    1999-01-01

    The `ideal' band pass filter can be used to isolate the component of a time series that lies within a particular band of frequencies. However, applying this filter requires a dataset of infinite length. In practice, some sort of approximation is needed. Using projections, we derive approximations that are optimal when the time series representations underlying the raw data have a unit root, or are stationary about a trend. We identify one approximation which, though it is only optimal for one...

  16. Iliotibial band friction syndrome

    OpenAIRE

    Lavine, Ronald

    2010-01-01

    Published articles on iliotibial band friction syndrome have been reviewed. These articles cover the epidemiology, etiology, anatomy, pathology, prevention, and treatment of the condition. This article describes (1) the various etiological models that have been proposed to explain iliotibial band friction syndrome; (2) some of the imaging methods, research studies, and clinical experiences that support or call into question these various models; (3) commonly proposed treatment methods for ili...

  17. Reinforcement of dented pipeline through composite sleeve repair systems subjected to fatigue by internal pressure; Reparos de dutos com amassamento atraves de luvas de materiais compositos submetidos a fadiga por pressao interna

    Energy Technology Data Exchange (ETDEWEB)

    Perrut, Valber Azevedo; Meniconi, Luiz Claudio de Marco [Centro de Pesquisas da Petrobras (CENPES). Gerencia de Tecnologia de Materiais, Equipamentos e Corrosao (Brazil)], e-mails: vperrut@petrobras.com.br, meniconi@petrobras.com.br; Souza Filho, Byron Goncalvez de [Transpetro (Brazil)], e-mail: byron.souza@petrobras.com.br

    2008-12-15

    Composite sleeve repair systems, now of widespread use in the market, were originally developed for the reinforcement of corroded pipelines. TRANSPETRO, the Brazilian pipeline operator, requested PETROBRAS/CENPES to address the behavior of sleeves when applied to dented pipelines. Simple verification experiments were carried out, in which both the dent filler material and the sleeve material were varied. Artificial dents with depths of 19% OD were imposed to 22 in. OD, 0.5 in. thick, API 5L X60 tubular specimens. Concrete and polymeric materials were tested for dent filler, whereas glass and carbon fiber composites, in two different thicknesses, were tried as the sleeve structural material. The main purpose of the repair sleeve in this case is to provide a repair procedure installed at low temperature and capable of reducing the stress range at the hot spot in the dent. The goal is to improve the fatigue resistance of the repaired pipeline. Low cycle fatigue tests were performed, both using non-repaired specimens (to serve as the basis for comparison) and specimens repaired using different schemes. The tests were fully instrumented to analyze strains in each specimen. After the fatigue tests, each specimen was pressurized until collapse, in order to quantify their ultimate strength. This paper reports the main results of the tests and the strain analysis for each repaired specimen, with the purpose of defining parameters which will serve to the design of future cases. (author)

  18. Banded transformer cores

    Science.gov (United States)

    Mclyman, C. W. T. (Inventor)

    1974-01-01

    A banded transformer core formed by positioning a pair of mated, similar core halves on a supporting pedestal. The core halves are encircled with a strap, selectively applying tension whereby a compressive force is applied to the core edge for reducing the innate air gap. A dc magnetic field is employed in supporting the core halves during initial phases of the banding operation, while an ac magnetic field subsequently is employed for detecting dimension changes occurring in the air gaps as tension is applied to the strap.

  19. Ultra wide band antennas

    CERN Document Server

    Begaud, Xavier

    2013-01-01

    Ultra Wide Band Technology (UWB) has reached a level of maturity that allows us to offer wireless links with either high or low data rates. These wireless links are frequently associated with a location capability for which ultimate accuracy varies with the inverse of the frequency bandwidth. Using time or frequency domain waveforms, they are currently the subject of international standards facilitating their commercial implementation. Drawing up a complete state of the art, Ultra Wide Band Antennas is aimed at students, engineers and researchers and presents a summary of internationally recog

  20. Standards for pipelines repairs approval through composite sleeves materials; Criterios para aceitacao de reparos em dutos atraves de luvas de material composito

    Energy Technology Data Exchange (ETDEWEB)

    Bayer, Richard Foerster; Bifulco, Antonio C.; Vilani, Eduardo C. [Rust Engenharia Ltda., Diadema, SP (Brazil)

    2005-07-01

    The current paper presents the standards that define the test demanded by the technical specifications set for the evaluation of composite sleeves repairs for steel industrial ducts and pipelines, as well as their forecasted results. Practical comments are given about the adhesion, tensile strength, interlaminate shear resistance, impact, hardness, circumferential elasticity modulus, axial elasticity modulus, and the poison ratio rests, as well as the interpretation of those demands are also discussed. Explains the repair project and the procedure to be followed importance, and why qualified personnel are necessary to install it. The repair project and the procedure, as well as the repair construction effectiveness are verified by hydrostatics testes in tubular specimens. (author)

  1. Amniotic Band Syndrome

    OpenAIRE

    Shetty, Prathvi; Menezes, Leo Theobald; Tauro, Leo Francis; Diddigi, Kumar Arun

    2012-01-01

    Amniotic band syndrome is an uncommon congenital disorder without any genetic or hereditary disposition. It involves fetal entrapment in strands of amniotic tissue and causes an array of deletions and deformations. Primary treatment is plastic and reconstructive surgery after birth with in utero fetal surgery also coming in vogue.

  2. Duodenojejunostomia látero-lateral: uma alternativa cirúrgica para o tratamento do "dumping" pós gastrectomia Side to side duodenojejunostomy: a surgical alternative for dumping after gastrectomy

    Directory of Open Access Journals (Sweden)

    Elizabeth Gomes dos Santos

    2004-04-01

    Full Text Available Most patients with partiaI gastrectomy have no postoperative problems. Some of them, however, develop severe nutritional disturbance, particularly those with Bilroth II reconstruction, which can be treated clinically in the majority of the cases. Those with important mal absorptive problems require surgery. In this article we present a technical alternative for those patients who need reintervention over a BII operation. Our technique has the advantage of not touching the duodenum previously sutured.

  3. DUAL BAND MONOPOLE ANTENNA DESIGN

    Directory of Open Access Journals (Sweden)

    P. Jithu

    2013-06-01

    Full Text Available The WLAN and Bluetooth applications become popular in mobile devices, integrating GSM and ISM bands operation in one compact antenna, can reduce the size of mobile devices. Recently, lot many investigations are carried out in designing a dual band antennas with operating frequencies in GSM band and in ISM band for mobile devices. Printed monopoles are under this investigation. In this paper, dual-band printed monopoles are presented to operate at GSM band i.e. 900 MHz and ISM band i.e. 2.4 GHz. We intend to observe the antenna characteristics on the network analyzer and verify the theoretical results with the practical ones.

  4. Optimization of working cathode position in sleeve-type bioelectrochemical system with inner chamber/outer chamber for azo dye treatment.

    Science.gov (United States)

    Kong, Fanying; Wang, Aijie; Ren, Hong-Yu

    2015-12-01

    In this study, the optimization of working cathode position in sleeve-type bioelectrochemical system (BES) was evaluated with inner/outer chamber for azo dye decolorization. Results showed that the working position in outer chamber performed better with decolorization efficiencies of 97.8 ± 2.1% (7h) and 94.0 ± 2.3% (16 h) than that in inner chamber as the volume ratio Vcathode:Vanode=1:1 and 3:1, respectively. The current and electrochemical impedance spectroscopy (EIS) analysis indicated that the proton/electron transfer and anolyte diffusion could be improved using outer chamber as working position. The decolorization with increased volume ratio could be further improved through the strategy of increasing substrate concentration, which would provide enough electrons and decrease diffusion resistance, further improving the whole performance with increased outer cathode volume. It has the great potential in sleeve-type configuration application and would create more challenges for process optimization and maintenance. PMID:26409856

  5. Small gap anastomosis to repair peripheral nerve rupture using a nerve regeneration chamber constructed by scissoring and sleeve jointing autologous epineurium

    Institute of Scientific and Technical Information of China (English)

    Peiji Wang; Zhongliang Zhou; Qirong Dong

    2011-01-01

    A number of studies have shown how to eliminate the misorientated docking of the peripheral nerve bundle in the traditional epineurium or perineudum anastomosis, thus avoiding neuroma formation and axonal outgrowth from the coaptation sites, and seriously hindering neural function recovery. Based on the "peripheral nerve selective regeneration theory", this experiment was designed to investigate the feasibility and benefits of a new small gap anastomosis repairing peripheral nerve rupture, by scissoring and sleeve jointing an autologous epineurium. In the proximal stump of the nerve, a 1 mm-long epineurium was annularly separated and removed, while a 3 mm-long epineurium was longitudinally incised in the distal stump after the epineurium was dissociated from proximal to distal. The epineuria of the two stumps and the longitudinal incision were sutured, leaving a 2 mm gap between the two nerve stumps. Results show that the experimental rats quickly recovered autonomic activities, and there were minimal adhesions at the outer surface of the epineurial tube to the surrounding tissue. The morphologic changes to the sciatic nerve showed that connective tissue hyperplasia of the small gaps was significantly reduced, and nerve fibers were arranged orderly. No such changes were observed in the neurorrhaphy in situ group. Thus, the experiment confirmed that the new small gap anastomosis to repair peripheral nerve rupture by scissoring and sleeve jointing autologous epineurium is feasible, and that it is superior to epineurium neurorrhaphy in situ.

  6. Diffuse interstellar absorption bands

    Institute of Scientific and Technical Information of China (English)

    XIANG FuYuan; LIANG ShunLin; LI AiGen

    2009-01-01

    The diffuse interstellar bands (DIBs) are a large number of absorption bands that are superposed on the interstellar extinction curve and are of interstellar origin. Since the discovery of the first two DIBs in the 1920s, the exact nature of DIBs still remains unclear. This article reviews the history of the detec-tions of DIBs in the Milky Way and external galaxies, the major observational characteristics of DIBs, the correlations or anti-correlations among DIBs or between DIBs and other interstellar features (e.g. the prominent 2175 Angstrom extinction bump and the far-ultraviolet extinction rise), and the proposed candidate carriers. Whether they are also present in circumstellar environments is also discussed.

  7. Semiconductors bonds and bands

    CERN Document Server

    Ferry, David K

    2013-01-01

    As we settle into this second decade of the twenty-first century, it is evident that the advances in micro-electronics have truly revolutionized our day-to-day lifestyle. The technology is built upon semiconductors, materials in which the band gap has been engineered for special values suitable to the particular application. This book, written specifically for a one semester course for graduate students, provides a thorough understanding of the key solid state physics of semiconductors. It describes how quantum mechanics gives semiconductors unique properties that enabled the micro-electronics revolution, and sustain the ever-growing importance of this revolution.

  8. Medline Plus

    Full Text Available ... Center, Miami, FL, 12/4/2013) Surgical Weight Loss: Sleeve Gastrectomy ... Aiding in a Faster Return to Patient Quality-of-Life (Washington University School of Medicine in St. Louis, ...

  9. Mechanisms of surgical control of type 2 diabetes

    DEFF Research Database (Denmark)

    Holst, Jens Juul; Madsbad, Sten

    2016-01-01

    responsible for postprandial hypoglycemia sometimes observed after bypass. Other operations (biliopancreatic-diversion and or sleeve gastrectomy) appear to involve different and/or additional mechanisms, and so does experimental bariatric surgery in rodents. However, unlike bypass surgery in humans...

  10. 离心铸造大型厚壁钢套用涂料变质的研制%Development of Subnano Particles Modificational Function Coating and its Application in Steel Sleeve

    Institute of Scientific and Technical Information of China (English)

    张征

    2013-01-01

    Through compound modification treatment for coating with help of adding sub-nano RE alloy and alkali metal salt during centrifugal casting thick-walled casting steel sleeve, the solidification sequence of the steel sleeve could be controlled to reduce the undercooled rate of outer solidification of steel sleeve and refine grain size as well as controlling the directional growth of carbide in the steel sleeve, resolving the problems of thermal transferring during solidification process and eliminating the presence of crack. Based on the Lewis acid-base theory from the chemical point of view,the modification mechanism of the cerium-based rare earth alloy on steel was analyzed. The sulfur content in the steel sleeve was controlled . Subnano particles can greatly increase the number of heterogeneous nucleation substrate, and further reduce the solidification undercooling of outer steel sleeve as well as improving the coating suspension. After the steel sleeve solidified, the collapsed coating can be reclaimed, realizing green casting.%在离心铸造厚壁大型钢套时,在涂料中引入稀土合金及碱金属盐复合变质剂,可减小钢套外层凝固所需的过冷度、细化晶粒、控制碳化物单一方向生长,解决凝固过程中热传导瓶颈问题,避免热裂纹产生.根据路易斯酸碱理论,从化学角度对以铈为主的稀土合金变质机理进行探讨.并对钢套硫含量控制水平进行界定.亚纳米稀土颗粒引入极大增加异质形核衬底数,进一步减小钢套外层凝固的过冷度,同时也改善了涂料的悬浮性.钢套凝固后,溃落的涂层可回用,实现绿色铸造.

  11. DEFINITION OF DENSITY OF THE THERMAL STATIONARY STREAMS ON A SURFACES OF A SLEEVE OF CYLINDER INTERNAL COMBUSTION ENGINE BY A METHOD OF OPTIMUM FILTRATION KALMANA

    Directory of Open Access Journals (Sweden)

    ZARENBIN V. G.

    2016-03-01

    Full Text Available Problem statement. At research warmly intensity and thermal weariness of internal combustion engines (ICE the knowledge and the analysis of local temperatures and thermal streams in the basic details forming the chamber of combustion is defining. Theoretically the problem consists in the decision of the equation of heat conductivity at the set features of course of thermal processes on border of bodies. Thus there is a problem of accuracy of the decision since it depends on accuracy of the task of real boundary conditions which can be received only by means of physical experiment and corresponding metrological maintenance. Unlike temperature the thermal stream cannot be measured directly, therefore it define on a difference of temperatures (thermal gradient a method or a calorimetric method. Definition of density of streams with the help as named gauges of a thermal stream when the measured temperatures are used at the decision of a return problem of heat conductivity for chosen thermometric an element is most extended. In this case, except the requirement of one-dimensionality of distribution of temperatures, linearity and the minimum distortion of temperature fields of thermal system, there are considerable difficulties of calculation derivative of the measured temperature. To perspective it is possible to carry methods of researches which it is accepted to name cybernetic diagnostics or identification of systems. Their essence consists that the deformed information on object is compared to its mathematical model and then are defined its condition, parameters or entrance influences by minimization of square-law function are nonviscous. In work definition of density of thermal stationary streams on surfaces of a sleeve of cylinder ICE by a method of optimum filtration Kalmana and also an estimation of their reliability and accuracy is made. Possibility of application of filtration Kalmana is shown at experimental researches in ICE. The purpose

  12. Bariatric surgery - effects on obesity and related co-morbidities

    DEFF Research Database (Denmark)

    Svane, Maria Saur; Madsbad, Sten

    2014-01-01

    Laparoscopic adjustable gastric banding (LAGB), laparoscopic Roux-en-Y gastric bypass (RYGB) and laparoscopic sleeve gastrectomy (SG) are the three most commonly performed bariatric procedures. Obesity responds well to bariatric surgery, with major long-lasting weight loss that is most pronounced...... vitamins and minerals, and anemia. Some patients have dumping after meals, and a few patients will develop postprandial hypoglycemia after RYGB. About 25% of patients require plastic surgery to provide relief from excessive skin tissue.......Laparoscopic adjustable gastric banding (LAGB), laparoscopic Roux-en-Y gastric bypass (RYGB) and laparoscopic sleeve gastrectomy (SG) are the three most commonly performed bariatric procedures. Obesity responds well to bariatric surgery, with major long-lasting weight loss that is most pronounced...... hormone responses, especially a 10-fold increase in glucagon-like peptide-1 (GLP-1), which improves insulin secretion. After gastric banding, the remission of diabetes depends more on weight loss. Bariatric surgery reduces cardiovascular risk factors including hypertension, lipid disturbances, non...

  13. Combined Double Sleeve Lobectomy and Superior Vena Cava Resection for Non-small Cell Lung Cancer with Persistent Left Superior Vena Cava.

    Science.gov (United States)

    Zhu, Daxing; Qiu, Xiaoming; Zhou, Qinghua

    2015-11-01

    A 65-year-old man with right central type of lung squamous carcinoma was admitted to our department. Bronchoscopy displayed complete obstruction of right upper lobe bronchus and infiltration of the bronchus intermedius with tumor. Chest contrast computed tomography revealed the tumor invaded right pulmonary artery, superior vena cava, and the persistant left superior vena cava flowed into the coronary sinus. The tumor was successfully removed by means of bronchial and pulmonary artery sleeve resection of the right upper and middle lobes combined with resection and reconstruction of superior vena cava (SVC) utilizing ringed polytetrafluoroethylene graft. To the best of our knowledge, this was the first report of complete resection of locally advanced lung cancer involving superior vena cava, right pulmonary artery trunk and main bronchus with persistant left superior vena cava. PMID:26582230

  14. Combined Double Sleeve Lobectomy and Superior Vena Cava Resection for Non-small Cell Lung Cancer with Persistent Left Superior Vena Cava

    Directory of Open Access Journals (Sweden)

    Daxing ZHU

    2015-11-01

    Full Text Available A 65-year-old man with right central type of lung squamous carcinoma was admitted to our department. Bronchoscopy displayed complete obstruction of right upper lobe bronchus and infiltration of the bronchus intermedius with tumor. Chest contrast computed tomography revealed the tumor invaded right pulmonary artery, superior vena cava, and the persistant left superior vena cava flowed into the coronary sinus. The tumor was successfully removed by means of bronchial and pulmonary artery sleeve resection of the right upper and middle lobes combined with resection and reconstruction of superior vena cava (SVC utilizing ringed polytetrafluoroethylene graft. To the best of our knowledge, this was the first report of complete resection of locally advanced lung cancer involving superior vena cava, right pulmonary artery trunk and main bronchus with persistant left superior vena cava.

  15. A schwannoma of the S1 dural sleeve was resected while the intact nerve fibers were preserved using a microscope. Report of a case with early MRI findings.

    Science.gov (United States)

    Kobayashi, S; Uchida, K; Kokubo, Y; Yayama, T; Nakajima, H; Inukai, T; Nomura, E; Baba, H

    2007-04-01

    In this report, we describe a small schwannoma of the dural sleeve and mention that it is often difficult to differentiate this tumor from lumbar disc herniation, especially a sequestered hernia, or a discal cyst. Gadolinium-enhanced MR images were a useful preoperative examination modality for differentiating this lesion from other diseases. Microscopically, the intradural tumor was successfully removed. The dura mater of the S1 nerve root was opened microsurgically, allowing the nerve fibers involved in the tumor to be identified. The involved fibers were cut around the tumor, and the lesion was resected while the intact nerve fibers were preserved. Based on histological examination of the resected specimen, the tumor was diagnosed as a schwannoma with multilocular cystic degeneration. Microsurgery allowed the tumor to be removed with minimal impairment from cutting of nerve fibers in the nerve root. PMID:17674301

  16. Sleeve bridging of the rhesus monkey ulnar nerve with muscular branches of the pronator teres:multiple ampliifcation of axonal regeneration

    Institute of Scientific and Technical Information of China (English)

    Yu-hui Kou; Pei-xun Zhang; Yan-hua Wang; Bo Chen; Na Han; Feng Xue; Hong-bo Zhang; Xiao-feng Yin; Bao-guo Jiang

    2015-01-01

    Multiple-bud regeneration,i.e., multiple amplification, has been shown to exist in peripheral nerve regeneration. Multiple buds grow towards the distal nerve stump during proximal nerve ifber regeneration. Our previous studies have veriifed the limit and validity of multiple ampli-ifcation of peripheral nerve regeneration using small gap sleeve bridging of small donor nerves to repair large receptor nerves in rodents. The present study sought to observe multiple ampli-ifcation of myelinated nerve ifber regeneration in the primate peripheral nerve. Rhesus monkey models of distal ulnar nerve defects were established and repaired using muscular branches of the right forearm pronator teres. Proximal muscular branches of the pronator teres were su-tured into the distal ulnar nerve using the small gap sleeve bridging method. At 6 months after suture, two-ifnger lfexion and mild wrist lfexion were restored in the ulnar-sided injured limbs of rhesus monkey. Neurophysiological examination showed that motor nerve conduction veloc-ity reached 22.63 ± 6.34 m/s on the affected side of rhesus monkey. Osmium tetroxide staining demonstrated that the number of myelinated nerve fibers was 1,657 ± 652 in the branches of pronator teres of donor, and 2,661 ± 843 in the repaired ulnar nerve. The rate of multiple ampliifcation of regenerating myelinated nerve ifbers was 1.61. These data showed that when muscular branches of the pronator teres were used to repair ulnar nerve in primates, effective regeneration was observed in regenerating nerve ifbers, and functions of the injured ulnar nerve were restored to a certain extent. Moreover, multiple ampliifcation was subsequently detected in ulnar nerve axons.

  17. Combustion-driven oscillation in a furnace with multispud-type gas burners. 4th Report. Effects of position of secondary air guide sleeve and openness of secondary air guide vane on combustion oscillation condition; Multispud gata gas turner ni okeru nensho shindo. 4. Nijigen kuki sleeve ichi oyobi nijigen kuki vane kaido no shindo reiki ni oyobosu eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Akiyama, I.; Okiura, K.; Baba, A.; Orimoto, M. [Babcock-Hitachi K.K., Tokyo (Japan)

    1994-07-25

    Effects of the position of a secondary air guide sleeve and the openness of a secondary air guide vane on combustion oscillation conditions were studied experimentally for multispud-type gas burners. Pressure fluctuation in furnaces was analyzed with the previously reported resonance factor which was proposed as an index to represent the degree of combustion oscillation. As a result, the combustion oscillation region was largely affected by both position of a guide sleeve and openness of a guide vane. As the openness having large effect on the ratio of primary and secondary air/tertiary air and the position hardly having effect on the ratio were adjusted skillfully, the burner with no combustion oscillation region was achieved in its normal operation range. In addition, as the effect of preheating combustion air was arranged with a standard flow rate or mass flow flux of air, it was suggested the combustion oscillation region due to preheating can be described with the same manner as that due to no preheating. 5 refs., 8 figs.

  18. Flat Bands Under Correlated Perturbations

    OpenAIRE

    Bodyfelt, Joshua D.; Leykam, Daniel; Danieli, Carlo; Yu, Xiaoquan; Flach, Sergej

    2014-01-01

    Flat band networks are characterized by coexistence of dispersive and flat bands. Flat bands (FB) are generated by compact localized eigenstates (CLS) with local network symmetries, based on destructive interference. Correlated disorder and quasiperiodic potentials hybridize CLS without additional renormalization, yet with surprising consequencies: (i) states are expelled from the FB energy $E_{FB}$, (ii) the localization length of eigenstates vanishes as $\\xi \\sim 1 / \\ln (E- E_{FB})$, (iii)...

  19. Cluster banding heat source model

    Institute of Scientific and Technical Information of China (English)

    Zhang Liguo; Ji Shude; Yang Jianguo; Fang Hongyuan; Li Yafan

    2006-01-01

    Concept of cluster banding heat source model is put forward for the problem of overmany increment steps in the process of numerical simulation of large welding structures, and expression of cluster banding heat source model is deduced based on energy conservation law.Because the expression of cluster banding heat source model deduced is suitable for random weld width, quantitative analysis of welding stress field for large welding structures which have regular welds can be made quickly.

  20. Development of Wide Band Feeds

    Science.gov (United States)

    Ujihara, H.; Ichikawa, R.

    2012-12-01

    Wide Band feeds are being developed at NICT, NAOJ, and some universities in Japan for VLBI2010, SKA, and MARBLE. SKA, the Square Kilometre Array, will comprise thousands of radio telescopes with square kilometer aperture size for radio astronomy. MARBLE consists of small portable VLBI stations developed at NICT and GSI in Japan. They all need wide band feeds with a greater than 1:10 frequency ratio. Thus we have been studying wide band feeds with dual linear polarization for these applications.

  1. Comparison of laparoscopy-assisted and open radical gastrectomy for advanced gastric cancer: A retrospective study in a single minimally invasive surgery center.

    Science.gov (United States)

    Hao, Yingxue; Yu, Peiwu; Qian, Feng; Zhao, Yongliang; Shi, Yan; Tang, Bo; Zeng, Dongzhu; Zhang, Chao

    2016-06-01

    Laparoscopy-assisted gastrectomy (LAG) has gained international acceptance for the treatment of early gastric cancer (EGC). However, the use of laparoscopic surgery in the management of advanced gastric cancer (AGC) has not attained widespread acceptance. This retrospective large-scale patient study in a single center for minimally invasive surgery assessed the feasibility and safety of LAG for T2 and T3 stage AGC. A total of 628 patients underwent LAG and 579 patients underwent open gastrectomy (OG) from Jan 2004 to Dec 2011. All cases underwent radical lymph node (LN) dissection from D1 to D2+. This study compared short- and long-term results between the 2 groups after stratifying by pTNM stages, including the mean operation time, volume of blood loss, number of harvested LNs, average days of postoperative hospital stay, mean gastrointestinal function recovery time, intra- and post-operative complications, recurrence rate, recurrence site, and 5-year survival curve. Thirty-five patients (5.57%) converted to open procedures in the LAG group. There were no significant differences in retrieved LN number (30.4 ± 13.4 vs 28.1 ± 17.2, P = 0.43), proximal resection margin (PRM) (6.15 ± 1.63 vs 6.09 ± 1.91, P = 0.56), or distal resection margin (DRM) (5.46 ± 1.74 vs 5.40 ± 1.95, P = 0.57) between the LAG and OG groups, respectively. The mean volume of blood loss (154.5 ± 102.6 vs 311.2 ± 118.9 mL, P < 0.001), mean postoperative hospital stay (7.6 ± 2.5 vs 10.7 ± 3.6 days, P < 0.001), mean time for gastrointestinal function recovery (3.3 ± 1.4 vs 3.9 ± 1.5 days, P < 0.001), and postoperative complications rate (6.4% vs 10.5%, P = 0.01) were clearly lower in the LAG group compared to the OG group. However, the recurrence pattern and site were not different between the 2 groups, even they were stratified by the TNM stage. The 5-year overall survival (OS) rates were 85.38%, 79.70%, 57

  2. Garage Band or GarageBand[R]? Remixing Musical Futures

    Science.gov (United States)

    Vakeva, Lauri

    2010-01-01

    In this paper, I suggest that it is perhaps time to consider the pedagogy of popular music in more extensive terms than conventional rock band practices have to offer. One direction in which this might lead is the expansion of the informal pedagogy based on a "garage band" model to encompass various modes of digital artistry wherever this artistry…

  3. Simultaneous confidence bands in linear regression analysis

    OpenAIRE

    Ah-Kine, Pascal Soon Shien

    2010-01-01

    A simultaneous confidence band provides useful information on the plausible range of an unknown regression model. For a simple linear regression model, the most frequently quoted bands in the statistical literature include the two-segment band, the three-segment band and the hyperbolic band, and for a multiple linear regression model, the most com- mon bands in the statistical literature include the hyperbolic band and the constant width band. The optimality criteria for confid...

  4. 胃癌根治术后腹腔感染的病原学分析%Etiological analysis on postoperative intra-abdominal infection after radical gastrectomy

    Institute of Scientific and Technical Information of China (English)

    肖华; 左朝晖; 欧阳永忠; 汤明; 唐卫; 潘曙光; 尹彬; 罗威; 权虎; 邱晓昕

    2013-01-01

    目的:对胃癌患者行根治性切除术后腹腔感染的病原学特征进行回顾性分析。方法回顾性分析479例胃癌患者根治术后腹腔感染的病原学种类及药敏结果。结果479例患者中32例术后出现腹腔感染(6.68%),病原学阳性者27例,阳性率为84.38%。检出病原菌32株,其中革兰阴性菌24株(75.00%),包括大肠埃希菌15株(46.86%),肺炎克雷伯菌3株(9.38%),普通变形杆菌、奇异变形杆菌、阴沟肠杆菌、普城沙雷菌、不动杆菌及铜绿假单胞菌各1株(各占3.13%);革兰阳性菌7株(21.88%),包括粪肠球菌4株(12.50%),耐久肠球菌、金黄色葡萄球菌及溶血性葡萄球菌各1株(3.13%);真菌1株(3.13%)。药敏结果显示32株病原菌中,对常用抗菌药物的耐药率较高,其中革兰阴性菌对美洛培南敏感性最高(91.67%),而革兰阳性菌对万古霉素最为敏感(85.71%)。结论大肠埃希菌、粪肠球菌、肺炎克雷伯菌是胃癌患者根治术后腹腔感染最主要的致病菌,临床上应注意合理使用抗菌药物。%Objective To analyze the epidemiology characteristics of bacteria in postoperative intra-abdominal infection after radical gastrectomy, retrospectively. Methods Data of 479 patients undergoing radical gastrectomy were collected. The species of the pathogens responsible for postoperative intra-abdominal infection and the result of drug susceptibility were analyzed, retrospectively. Results There were 32 (6.68%) among the 479 patients were suffered from postoperative intra-abdominal infection, in which 27 (84.38%) patients had positive pathogen detection. Total of 32 bacilli lines were separated, of which 24 (75.00%) strains were Gram-negative bacilli, including 15 (46.86%) strains of Escherichia coli, 3 (9.38%) strains of Klebsiellap pneumonia and one strains of Proteus vulgaris, Proteus mirabilis, Enterobacter cloacae, Princeton marcescens

  5. The Moral Ends of Band

    Science.gov (United States)

    Allsup, Randall Everett

    2012-01-01

    This article provides a theoretical framework through which to reimagine and revitalize contemporary music education practices, using the large ensemble paradigm called "band" as the primary unit of analysis. Literature suggests that band places too much emphasis on teacher control and external measures of validation. Critics propose replacing…

  6. Efeito imediato da utilização da joelheira elástica em indivíduos com osteoartrite Immediate effect of the elastic knee sleeve use on individuals with osteoarthritis

    Directory of Open Access Journals (Sweden)

    Flavio Fernandes Bryk

    2011-10-01

    Full Text Available INTRODUÇÃO: A osteoartrite (OA de joelho normalmente ocasiona dificuldades na realização de diversas atividades rotineiras, sendo um dos principais motivos de procura por serviços médicos e fisioterapêuticos. Existem diversas modalidades de tratamento, com resultados variados. A utilização da joelheira como recurso adjunto tem-se mostrado controversa na literatura. OBJETIVO: Analisar a eficácia imediata da joelheira elástica na dor e na capacidade funcional em indivíduos com OA de joelho. MÉTODOS: Foram analisados 74 sujeitos sintomáticos (132 joelhos com OA de joelho por meio dos testes Stair Climb Power Test (SCPT, Timed Up and Go (TUG e Caminhada de 8 Metros (C8M, além da escala visual analógica (EVA para dor. Os testes foram realizados com e sem joelheira; a ordem e a presença ou ausência das joelheiras durante os testes foram randomizadas e com avaliador cego. RESULTADOS: Foi encontrada diferença estatisticamente significante entre as duas situações comparadas (com e sem joelheira para EVA (P 0,1339. CONCLUSÃO: A joelheira elástica foi eficiente na melhora imediata da capacidade funcional e da dor em indivíduos com OA de joelho, pois melhorou o desempenho durante os testes propostos. Sendo assim, entende-se que se trata de um recurso coadjuvante para o tratamento da OAJ por ser prático, útil, de fácil emprego clínico e que pode auxiliar e/ou facilitar a realização de exercícios terapêuticos.BACKGROUND: Knee osteoarthritis (KOA is one of the major reasons for seeking medical and physical therapy services, because it usually causes difficulties in performing daily life activities. There are several types of treatment, with varied results. The use of knee sleeve as an adjuvant resource has been controversial in the literature. OBJECTIVE: To assess the immediate efficacy of elastic knee sleeve on pain and functional capacity of individuals with KOA. METHODS: Seventy-four patients (132 knees with symptomatic KOA

  7. Instrument access device for use during e.g. aparoscopic choecystectomy procedure, has distal anchoring ring provided to locate within wound interior, and retractor with sleeve extending from ring to retract sides of wound opening

    OpenAIRE

    Bonadio, Frank; Butler, John; Vaugh, Trevor; MacNally, Shane

    2008-01-01

    The device (90) has two instrument seals (71, 72) for effecting a seal around two instruments extended through the device, respectively. The instrument seals are arranged in sealing relationship to a body of a patient. A distal anchoring ring (401) is provided to locate within a wound interior. A retractor with a sleeve (402) extends proximally from the distal ring to retract laterally sides of a wound opening. One instrument seal is spaced apart and is formed separately from another instrume...

  8. Band structure of 79Br

    International Nuclear Information System (INIS)

    High-spin states of 79Br have been studied in the reaction 76Ge(7Li, 4nγ) at 32 MeV. A gamma-detector array with twelve Compton-suppressed HPGe detectors was used. The positive-parity yrast states, interpreted as a rotationally aligned g(9(2)) proton band, and the negative-parity ground state band have been extended to spins of (33(2+)) and (25(2-)), respectively. Lifetime measurements indicate that both bands have a similar quadrupole deformation of β2 ∼ 0.2. The positive-parity α = -(1(2)) band has been identified. Several new inter-band transitions are observed. A cranked-shell model analysis shows that the νg(9(2)) and πg(9(2)) alignments occur in the positive-parity and the negative-parity bands at rotational frequencies of ℎω ∼ 0.6 and 0.4 MeV, respectively. The level energies and the electromagnetic properties of the g(9(2)) band can be well reproduced by a particle-rotor model calculation with an axially symmetric core

  9. Ingestion of polydextrose increase the iron absorption in rats submitted to partial gastrectomy A ingestão de polidextrose aumenta a absorção de ferro em ratos submetidos à gastrectomia parcial

    Directory of Open Access Journals (Sweden)

    Elisvânia Freitas dos Santos

    2010-12-01

    Full Text Available PURPOSE: To investigate whether polydextrose stimulates iron absorption in rats submitted to partial gastrectomy and sham operated. METHODS: The rats were submitted to partial gastrectomy (Billroth II or laparotomy (sham-operated control, in groups of 20 and 20 each respectively. The animals were fed with a control diet (AIN-93M without polydextrose or a diet containing polydextrose (50g/Kg of diet for eight weeks. They were divided into four subgroups: sham-operated and Billroth II gastrectomy and with or without polydextrose. Two animals died during the experiment. All rats submitted to gastrectomy received B-12 vitamin (intramuscular each two weeks. The hematocrit and hemoglobin concentration were measured at the start and on day 30 and 56 after the beginning of the experimental period. At the end of the study, the blood was collected for determination of serum iron concentration. RESULTS: The diet with polydextrose reduced the excretion of iron. Apparent iron absorption was higher in the polydextrose fed groups than in the control group. The haematocrit and haemoglobin concentration were lower after Billroth II gastrectomy rats fed the control diet as compared to the polydextrose diet groups. CONCLUSION: Polydextrose increase iron absorption and prevents postgastrectomy anemia.OBJETIVO: Investigar se a polidextrose estimula a absorção de ferro em ratos submetidos à gastrectomia parcial e sham operados. MÉTODOS: Os ratos foram submetidos à gastrectomia parcial (Billroth II e à laparotomia (controle sham-operados em grupos de 20 e 20 cada, respectivamente. Os animais foram alimentados com uma dieta controle (AIN-93M, sem polidextrose ou uma dieta contendo polidextrose (50g/kg de dieta durante oito semanas. Foram divididos em quatro grupos: sham-operados e com gastrectomia BII e com ou sem polidextrose. Dois animais morreram durante o experimento. Todos os ratos com gastrectomia receberam vitamina B-12 (intramuscular a cada duas semanas

  10. Microstrip microwave band gap structures

    Indian Academy of Sciences (India)

    V Subramanian

    2008-04-01

    Microwave band gap structures exhibit certain stop band characteristics based on the periodicity, impedance contrast and effective refractive index contrast. These structures though formed in one-, two- and three-dimensional periodicity, are huge in size. In this paper, microstrip-based microwave band gap structures are formed by removing the substrate material in a periodic manner. This paper also demonstrates that these structures can serve as a non-destructive characterization tool for materials, a duplexor and frequency selective coupler. The paper presents both experimental results and theoretical simulation based on a commercially available finite element methodology for comparison.

  11. Collective bands in superdeformed nuclei

    International Nuclear Information System (INIS)

    The collective properties of excited superdeformed bands have been investigated in the framework of self-consistent cranked Nilsson plus quasiparticle random-phase approximation. The expected octupole nature of some bands observed recently in some nuclei has been confirmed by a comparative analysis of their E1 decays to the yrast band and of the anomalous behavior of their dynamical moment of inertia. It is also shown that the onset of supederformation affects considerably the structure of the giant resonances and greatly enhances the collectivity of the low-lying scissors mode. (author)

  12. Rotational Bands in 172W

    Science.gov (United States)

    Greenberg, J.; Guess, C. J.; Tandel, S.; Chowdhury, P.; Carpenter, M. P.; Hartley, D. J.; Janssens, R. V. F.; Khoo, T. L.; Lauritsen, T.; Lister, C. J.; Seweryniak, D.; Shirwadkar, U.; Wang, X.; Zhu, S.

    2015-10-01

    Studying the structure of rotational bands in 172W is valuable for gaining a better understanding of deformed nuclei. Highly excited states of the isotope were populated from a 230 MeV 50Ti beam incident on a 128Te target at Argonne National Laboratory using the ATLAS accelerator. γ emissions from 172W in the range were measured using Compton suppressed germanium detectors in the Gammasphere array. Using this data, three new rotational bands were found, and several other bands were expanded. Swarthmore College Summer Research Fellowship.

  13. Some parallel banded system solvers

    Energy Technology Data Exchange (ETDEWEB)

    Dongarra, J.J.; Sameh, A.H.

    1984-12-01

    This paper describes algorithms for solving narrow banded systems and the Helmholtz difference equations that are suitable for multiprocessing systems. The organization of the algorithms highlight the large grain parallelism inherent in the problems. 13 references, 5 tables.

  14. 袖阀管注浆封闭截水施工技术%Construction Technology of Water Truncation with Sleeve Valve Pipe

    Institute of Scientific and Technical Information of China (English)

    霍小妹

    2011-01-01

    Water gushes occurred during the foundation excavation construction of underground garage service building of some residential building in Taiyuan. After comparing different grouting technologies, grouting with sleeve valve pipe is selected to solidify the ground. Mix proportion and grouting pressure of slurry are analyzed. Problems during construction are introduced in detail such as construction process, equipments selection, holes arrangement and forming, slurry making and grouting. Points for attention are discussed. By the reinforcement measures, the soil properties can reach construction requirements, and the water gushing is controlled.%针对太原市某住宅楼地下车库基坑工程在土方开挖中遇到涌水现象,经注浆技术比较,选用袖阀管注浆法对土体进行固化止水.分析砂土中所注浆液的配合比和注浆压力,对注浆施工流程、机械选用、钻孔布置及钻孔、浆液配制、下管和注浆施工等问题进行详细介绍,对注浆过程注意事项进行探讨.经加固的土体能满足施工要求.

  15. Analysis of recurrence for locally advanced gastric or gastroesophageal cancer patients after receiving curative gastrectomy ( > D1) and its indication for adjuvant chemoradiotherapy

    International Nuclear Information System (INIS)

    Objective: The benefit of adjuvant chemoradiotherapy remains controversial for gastric cancer patients treated with more than D1 dissection. This retrospective analysis is to distinguish the first site of recurrence in patients treated with curative resection and more than D1 dissection and to find any feasible adjuvant concurrent chemoradiotherapy recommendation for them. Methods: All patients treated between January 2002 and December 2004 who met the following criteria were analyzed: primary gastric or gastroesophageal cancer, underwent curative gastrectomy ( UICC R0 ) and more than D1 lymphadenectomy, pathologically staged as T3-4N0-1 M0, or any Tx N2-3M0. There were 297 patients analyzed and 19.5%, 52.2%, 17.8% , 10.4% of patients had stage II (T3 N0 M0, T1 N2 M0), IIIa, IIIb and IV ( M0 ) diseases,respectively. 76. 1% of patients received adjuvant chemotherapy, while Only 2 patients underwent adjuvant radiotherapy. Failure patterns and the prognostic factors for locoregional recurrence were analyzed. Results: The median follow-up time was 61 months and the follow-up rate was 92.3%. 145 patients developed recurrence with a median recurrent time of 26 months. Locoregional recurrence was observed in 82 patients and distant metastasis in 79 patients. Gastric stump, anastomosis, intra-abdominal lymph nodes were the most common sites of locoregional recurrence. Liver and lung were the most frequent sites of distant metastasis. Prognostic variables for locoregional recurrence were identified after univariate analysis,including pathologic type (χ2 = 11.50, P = 0.009), total number of dissected lymph nodes (χ2 = 6. 65, P =0.010), the number of positive lymph node (χ2 =5.80, P =0.016), lymph node capsular invasion (χ2 =pathologic type, total number of dissected lymph nodes, lymph node capsular invasion, AJCC TNM stage and Borrmann type were independent prognostic factors for locoregional recurrence (χ2 = 6.77, 19.33, 17.84 and 6.02, P =0.009, 0.000, 0.000 and 0

  16. Subtotal Gastrectomy With Billroth II Anastomosis Is Associated With a Low Risk of Ischemic Stroke in Peptic Ulcer Disease Patients: A Nationwide Population-Based Study.

    Science.gov (United States)

    Chen, Chien-Hua; Lin, Cheng-Li; Kao, Chia-Hung

    2016-04-01

    Duodenal diversion can ameliorate lipid and glucose metabolism. We assessed the risk of stroke after subtotal gastrectomy with Billroth II anastomosis (SGBIIA) in peptic ulcer disease (PUD).We identified 6425 patients who received SGBIIA for PUD between 1998 and 2010 from the Taiwan National Health Insurance Research Database as the study cohort; we frequency-matched them with 25,602 randomly selected controls from the PUD population who did not receive SGBIIA according to age, sex, index year, and comorbidities including hypertension, diabetes mellitus, hyperlipidemia, coronary artery disease, congestive heart failure, chronic kidney disease, chronic obstructive pulmonary disease (COPD), and obesity. All patients were followed until the end of 2011 to determine the incidence of stroke.The incidence of stroke was lower in patients in the SGBIIA cohort than in those in the non-SGBIIA cohort (18.9 vs 22.9 per 1000 person-years, adjusted hazard ratio [aHR] 0.80, 95% confidence interval [CI] 0.72-0.89, P < 0.001). The risk of ischemic stroke (aHR 0.77, 95% CI 0.69-0.86, P < 0.001), rather than hemorrhagic stroke (aHR 1.00, 95% CI 0.78-1.28), was lower for the SGBIIA cohort than for the non-SGBIIA cohort according to the multivariable Cox proportional hazard regression analysis. The relative risk of ischemic stroke after SGBIIA was lower in men (aHR 0.77, 95% CI 0.69-0.86) than in women (aHR 0.80, 95% CI 0.65-0.99) and in patients aged ≥65 years (aHR 0.72, 95% CI 0.63-0.81) than in those of other age groups (≤49 years, aHR 0.82, 95% CI 0.48-1.39; 50-64 years, aHR 1.01, 95% CI 0.79-1.28). The relative risk of ischemic stroke after SGBIIA was also reduced in patients with comorbidities (aHR 0.84, 5% CI 0.75-0.95) rather than in those without comorbidities (aHR 0.81, 95% CI 0.59-1.12).SGBIIA is associated with a low risk of ischemic stroke for PUD patients, and its protective effect is prominent in men, patients aged ≥65 years, and those with comorbidities

  17. Narrow-Band Microwave Filters

    Directory of Open Access Journals (Sweden)

    A.V. Strizhachenko

    2010-01-01

    Full Text Available Original design of the narrow-band compact filters based on the high-quality waveguide-dielectric resonator with anisotropic materials has been presented in this work. Designed filters satisfy the contradictory requirements: they provide the narrow frequency band (0.05 ÷ 0.1 % of the main frequency f0 and the low initial losses α0 ≤ 1 dB.

  18. Dipole Bands in 196Hg

    International Nuclear Information System (INIS)

    High spin states in 196Hg have been populated in the 198Pt(α,6n) reaction at 65 MeV and the level scheme has been extended. A new dipole band has been observed and a previously observed dipole has been confirmed. Excitation energies, spins and parities of these bands were determined from DCO ratio and linear polarization measurements. Possible quasiparticle excitations responsible for these structures are discussed.

  19. 手助腹腔镜胃癌 D2根治术的团队配合%Teamwork Cooperation in Hand-assisted Laparoscopic D2 Radical Gastrectomy

    Institute of Scientific and Technical Information of China (English)

    周均; 曹永宽; 宋亚宁; 王永华; 张国虎; 王培红; 李旭

    2014-01-01

    目的:探讨手助腹腔镜胃癌D2根治术的团队配合技巧及重要性。方法对我中心2010年12月~2013年6月180例手助腹腔镜胃癌D2根治术的临床资料进行回顾性总结。术者及助手相对固定,只需术者及扶镜手两人相互配合,就能完成肿瘤的根治性切除及淋巴结清扫。结果180例均在手助腹腔镜下完成手术,全胃切除术84例,远端胃切除术81例,近端胃切除术15例。手术切口长度(6.9±0.5)cm;术中出血量(226.1±127.0)ml;手术时间(172.2±34.1)min;病检获淋巴结数(17.3±5.0)枚;术后住院时间(9.3±2.0) d。围手术期死亡1例,手术残端癌残留2例。手术相关并发症率6%(11/180)。术后随访1~24个月,失访12例(失访率7%),同时性肝转移4例,异时性淋巴结转移2例,局部复发1例,未发生切口和穿刺口种植。结论良好的团队配合是保证手助腹腔镜胃癌D2根治术的必备条件,对肿瘤的根治程度、手术时间及术后并发症的发生起着至关重要的作用。%Objective To discuss the importance of teamwork coorperation in hand-assisted laparoscopic D2 radical gastrectomy. Methods Clinical materials of 180 patients with gastric cancer undergoing hand-assisted laparoscopic D2 radical gastrectomy from December 2010 to June 2013 were summarized retrospectively.The lymph nodes dissection and radical tumor excision were performed by two persons of cooperation that the operator surgeon worked with camera assistant in a relatively fixed mode in the operation. Results The hand-assisted laparoscopic D2 radical gastrectomy was accomplished in all the patients.Among the 180 patients, gastrectomy was performed in 84 cases, distal gastrectomy in 81 cases, and proximal gastrectomy in 15 cases.The average length of incision was (6.9 ±0.5) cm, the blood loss was (226.1 ±127.0) ml, the operative time was (172.2 ±34.1) min, the number

  20. Band loss by nestling mourning doves

    Science.gov (United States)

    Kaczynski, C.F.; Kiel, W.H.

    1963-01-01

    Nestling mourning doves (Zenaidura macroura) were banded and checked for band loss prior to fledging at Parchman, Mississippi, during the months of June-August, 1960. Three hundred seventy-seven nestlings 4-6 days of age were banded, 117 with size 3 bands, 120 with size 3A bands, and 140 with size 3A bands secured by Dalzoflex tape. Two hundred twenty nestlings 7-9 days of age were banded, 114 with size 3 bands and 106 with size 3A bands. In the 4- to 6-day age group, 66.3 percent of the size 3A bands were lost. This was a statistically significant departure from the 7.7 percent loss of size 3 bands. No taped bands were lost. However, predators ate 13.8 percent of the nestlings with taped bands and significantly fewer of the nestlings banded without tape. In the 4- to 6-day age group, percentages of nestlings known to be available for band recovery at 9 days or older were: size 3, 69.2 percent; size 3A with tape, 59.0 percent; size 3A, 25.8 percent. In the 7-to 9-day age group, there was a 3.3 percent loss of size 3A bands and no loss of size 3 bands. The minimum age at which nestlings were banded without subsequent loss of bands was 6 days for size 3 and 8 days for size 3A.

  1. Fatores prognósticos nas gastrectomias com linfadenectomia D2 por adenocarcinoma gástrico Prognostic factors in D2 gastrectomy for gastric adenocarcinoma

    Directory of Open Access Journals (Sweden)

    Osvaldo Antonio Prado Castro

    2009-09-01

    comprometimento tumoral na câmara gástrica, o estádio da doença, a ocorrência de metástases a distância e principalmente a presença de metástases linfonodais, constituíram-se em variáveis com valor prognóstico independente.BACKGROUND: Lymphatic spread is more common in gastric cancer than the hematogenic one. Thus, the locoregional dissection type D2 seems to be important. AIM: To evaluate the overall survival after D2 gastrectomy for gastric adenocarcinoma and to determine the most important prognostic factors, including those with independent statistical value. METHODS: Prospective study with 125 patients operated between August 1997 and October 2005. The technique employed followed strictly the protocol of the National Cancer Center - Tokyo. RESULTS: There were 73 men and 52 women with ages ranging 28 to 84 years (mean of 58.96 ± 14.01. Seventy per cent of the lesions were located at the distal portion of the stomach, 20% were proximal and 10% comprised the whole organ. The stage distributions were: I - 37 cases (29.6%, II - 20 cases (16%, III - 37 cases (29.6%, and IV - 31 cases (24.8%. It was performed the amount of 73 subtotal gastrectomies and 52 totals. The morbidity rate was 26.4%, mainly, due to leakage and pulmonary complications. The overall mortality rate was 9.6%. After a mean follow-up of 48 months, 68 (54.4% patients were dead, representing an overall survival rate of 45.6%. Univariate and multivariate statistical analysis revealed that: tumors comprising the whole stomach, beyond the serosal layer (T3 or T4, with more than seven metastatic lymph nodes (N2 or N3, with distant metastasis (M1, and belonging to the stage III or IV of the disease, were related to a poor prognosis. CONCLUSIONS: Less than a half of the patients were alive after a mean follow-up of almost four years; the TNM stage system was the main prognostic factor, ergo, the extension of the lesions, the stage of the disease, metastatic occurrence and mainly the lymph node involvement

  2. U and Pu Gamma-Ray Measurements of Spent Fuel Using a Gamma-Ray Mirror Band-Pass Filter

    Energy Technology Data Exchange (ETDEWEB)

    Ziock, Klaus-Peter [ORNL; Alameda, J.B. [Lawrence Livermore National Laboratory (LLNL); Brejnholt, N.F. [Lawrence Livermore National Laboratory (LLNL); Decker, T.A. [Lawrence Livermore National Laboratory (LLNL); Descalle, M.A. [Lawrence Livermore National Laboratory (LLNL); Fernandez-Perea, M. [Lawrence Livermore National Laboratory (LLNL); Hill, R.M. [Lawrence Livermore National Laboratory (LLNL); Kisner, R.A. [Oak Ridge National Laboratory (ORNL); Melin, A.M. [Oak Ridge National Laboratory (ORNL); Patton, B.W. [Lawrence Livermore National Laboratory (LLNL); Ruz, J. [Lawrence Livermore National Laboratory (LLNL); Soufli, R. [Lawrence Livermore National Laboratory (LLNL); Pivovaroff, M.J. [Lawrence Livermore National Laboratory (LLNL)

    2014-01-01

    Abstract. We report on the use of grazing incidence gamma-ray mirrors to serve as a narrow band-pass filter for advanced non-destructive analysis (NDA) of spent nuclear fuel. The purpose of the mirrors is to limit the radiation reaching a HPGe detector to narrow spectral bands around characteristic emission lines from fissile isotopes in the fuel. This overcomes the normal rate issues when performing gamma-ray NDA measurements. In a proof-of-concept experiment, a set of simple flat gamma-ray mirrors were used to directly observe the atomic florescence lines from U and Pu from spent fuel pins with the detector located in a shirt-sleeve environment. The mirrors, consisting of highly polished silicon substrates deposited with WC/SiC multilayer coatings, successfully deflected the lines of interest while the intense primary radiation beam from the fuel was blocked by a lead beam stop. The gamma-ray multilayer coatings that make the mirrors work at the gamma-ray energies used here (~ 100 keV) have been experimentally tested at energies as high as 645 keV, indicating that direct observation of nuclear emission lines from 239Pu should be possible with an appropriately designed optic and shielding configuration.

  3. Direct band gap silicon allotropes.

    Science.gov (United States)

    Wang, Qianqian; Xu, Bo; Sun, Jian; Liu, Hanyu; Zhao, Zhisheng; Yu, Dongli; Fan, Changzeng; He, Julong

    2014-07-16

    Elemental silicon has a large impact on the economy of the modern world and is of fundamental importance in the technological field, particularly in solar cell industry. The great demand of society for new clean energy and the shortcomings of the current silicon solar cells are calling for new materials that can make full use of the solar power. In this paper, six metastable allotropes of silicon with direct or quasidirect band gaps of 0.39-1.25 eV are predicted by ab initio calculations at ambient pressure. Five of them possess band gaps within the optimal range for high converting efficiency from solar energy to electric power and also have better optical properties than the Si-I phase. These Si structures with different band gaps could be applied to multiple p-n junction photovoltaic modules. PMID:24971657

  4. X-Band PLL Synthesizer

    Directory of Open Access Journals (Sweden)

    P. Kutin

    2006-04-01

    Full Text Available This paper deals with design and realization of a PLL synthesizer for the microwave X−band. The synthesizer is intended for use as a local oscillator in a K−band downconverter. The design goal was to achieve very low phase noise and spurious free signal with a sufficient power level. For that purpose a low phase noise MMIC VCO was used in phase locked loop. The PLL works at half the output frequency, therefore there is a frequency doubler at the output of the PLL. The output signal from the frequency doubler is filtered by a band-pass filter and finally amplified by a single stage amplifier.

  5. Shear Banding of Complex Fluids

    Science.gov (United States)

    Divoux, Thibaut; Fardin, Marc A.; Manneville, Sebastien; Lerouge, Sandra

    2016-01-01

    Even in simple geometries, many complex fluids display nontrivial flow fields, with regions where shear is concentrated. The possibility for such shear banding has been known for several decades, but in recent years, we have seen an upsurge in studies offering an ever-more precise understanding of the phenomenon. The development of new techniques to probe the flow on multiple scales with increasing spatial and temporal resolution has opened the possibility for a synthesis of the many phenomena that could only have been thought of separately before. In this review, we bring together recent research on shear banding in polymeric and soft glassy materials and highlight their similarities and disparities.

  6. 近端胃切除和远端胃切除术后远期并发症的对比观察%Proximal Gastric Resection and Long-term Complications after Distal Gastrectomy

    Institute of Scientific and Technical Information of China (English)

    董昶三

    2015-01-01

    Objective To observe and compare the proximal gastric resection and long-term complications after distal gastrectomy.Methods 30 patients were randomly selected in 2013 January -2015 year in January in our hospital for proximal gastrectomypatients as the observation group A, 30 cases were randomly selected at the same timein our hospital for a distal gastrectomy patients as the observation group B.Results There were no obvious differences in incidence compared two groups of anastomotic inflammation, anastomotic ulcer complications (P > 0.05); observation group A weight loss, malnutrition and the incidence of reflux esophagitis and other complications was significantly higher than that in observation group B, the incidence was observed in the B group of bile reflux gastritis was significantly higher than that observed in A group, two groups of data by statistical treatment after the show significant difference (P> 0.05).Conclusion Proximal gastrectomy and anastomotic inflammation after distal gastrectomyand anastomosis of oral cavity ulcer incidence were higher, reflux esophagitis and bile reflux gastritis are a common type of long-term complications of proximal gastrectomyand distal gastrectomy.%目的 观察并对比近端胃切除和远端胃切除术后远期并发症的发生情况.方法 随机选取2013年1月~2015年1月间于本院行近端胃切除术的30例患者作为观察A组,随机选取同时期于本院行远端胃切除术的30例患者作为观察B组.结果 对比两组吻合口炎、吻合口溃疡等并发症的发生几率未见明显差异(P> 0.05);观察A组消瘦、营养不良以及反流性食管炎等并发症的发生几率明显高于观察B组,观察B组胆汁反流性胃炎的发生几率明显高于观察A组,两组数据经统计学处理后显示差异显著(P> 0.05).结论 近端胃切除术以及远端胃切除术后的吻合口炎以及吻合口腔溃疡的发生几率均较高,反流性食管炎以及胆汁反流性胃炎分

  7. 腹腔镜与开腹胃癌根治术的疗效及对患者免疫功能的影响%Laparoscopic versus open gastric radical gastrectomy: the efficacy and impact on immune function

    Institute of Scientific and Technical Information of China (English)

    夏亚斌; 郑成竹

    2013-01-01

    Objective:To compare the efficacies between laparoscopic and open radical gastrectomy and their impacts on immune function of patients.Methods:The clinical data of 114 gastric cancer patients admitted over the past 3 years were retrospectively analyzed.Of the patients,55 cases underwent laparoscopic gastrectomy (laparoscopy group) while 59 cases were subjected to open gastrectomy (laparotomy group).The postoperative immune function alterations,and intra-and postoperative conditions between the two groups of patients were compared.Results:The determination results for immune function parameters at 24 and 72 h after operation showed the levels of IL-2 and IL-6 in both groups were increased significantly compared with those before operation (all P<0.01),but the increasing degrees of both factors in laparotomy group were greater than those in laparoscopy group (all P<0.05); the peripheral blood levels of CD3+,CD4+,and CD8+ cells in laparotomy group were decreased significantly versus those before operation (all P<0.05),while no significant changes in above T cell subsets were noted in laparoscopy group (all P>0.05).Compared with laparotomy group,the intraoperative blood loss,frequency in analgesic use and postoperative complications in laparoscopy group were significantly reduced,and times to first flatus passage,liquid diet and ambulation as well as length of postoperative hospital stay were significantly shortened (all P<0.05).Conclusion:The efficacy of laparoscopic gastrectomy is better than that of open surgery,because it exerts less impact on immune function and with little systemic damage on the patients.%目的:比较腹腔镜与开腹胃癌根治术的疗效及对患者免疫功能的影响.方法:回顾性分析3年内收治的1 14例胃癌患者临床资料,其中55例行腹腔镜胃癌根治术(腹腔镜组)和59例行开腹胃癌根治术(开腹组),比较两组术后免疫功能的变化,以及术中、术后情况.结果:术后24,72 h免疫指

  8. Radiographic study of patients submitted to total gastrectomy using Safatle reconstruction technique Estudo radiológico em doentes submetidos a gastrectomia total com reconstrução à Safatle

    Directory of Open Access Journals (Sweden)

    Alberto Luiz Monteiro Meyer

    2008-09-01

    Full Text Available BACKGROUND: Ever since the first total gastrectomy, there has always been a great concern in increasing the survival of patients, and with the advance of techniques, in improving the quality of life of these patients. The most common reconstruction technique of the gastrointestinal transit is the Roux-en-Y. The reposition of a functional pouch in place of the resected stomach was proposed to minimize the postprandial symptoms, improve the nutritional grade and consequently, the quality of life. The Safatle reconstruction of the gastrointestinal transit technique consists of, in short, in the association of the interposition of the jejunal loop with partial transit through the duodenum, with an inverted Roux-en-Y and with the creation of a pouch which resembles the dynamics of the stomach, achieved by duodenojejunal segment which has an antiperistalsis emptying. AIM: To assess, by radiographic means, the emptying of the duodenojejunal pouch in patients submitted to total gastrectomy using the Safatle reconstruction technique. METHOD: Twelve patients submitted to total gastrectomy using the Safatle technique due to gastric cancer were studied. They were summoned to perform contrasted radiographies of the esophagus-duodenum-jejunum by the videofluoroscopic method during the months of July and August, 2005. RESULTS: All the patients presented satisfactory movement of the duodenojejunal pouch and an adequate emptying in antiperistalsis without food stasis. There has been an average 25-minute drainage time of the duodenojejunal pouch. CONCLUSION: The duodenojejunal pouch, in the patients submitted to total gastrectomy using the Safatle reconstruction, presented adequate emptying and movement.RACIONAL: Desde a primeira gastrectomia total, houve sempre a preocupação em aumentar a sobrevida e, com o aprimoramento das técnicas, de melhorar a qualidade de vida. A técnica mais aceita para a reconstrução do trânsito intestinal após gastrectomia total

  9. Successful laparoscopic distal gastrectomy with D2 lymph node dissection preserving the common hepatic artery branched from the left gastric artery for advanced gastric cancer with an Adachi type VI (group 26) vascular anomaly.

    Science.gov (United States)

    Goto, Hironobu; Yasuda, Takashi; Oshikiri, Taro; Imanishi, Tatsuya; Yamashita, Hironori; Oyama, Masato; Kakinoki, Keitaro; Ohara, Tadayuki; Sendo, Hiroyoshi; Fujino, Yasuhiro; Tominaga, Masahiro; Kakeji, Yoshihiro

    2016-12-01

    We report a case of successful laparoscopic distal gastrectomy with D2 lymph node dissection preserving the common hepatic artery branched from the left gastric artery for advanced gastric cancer with an Adachi type VI (group 26) vascular anomaly. A 76-year-old female patient was admitted with a diagnosis of advanced gastric cancer at the anterior wall to the lesser curvature of the antrum (cT3N0M0 cStage IIA). Dynamic computed tomography showed the ectopia of the common hepatic artery branched from the left gastric artery. We made a diagnosis of an Adachi type VI (group 26) vascular anomaly and performed the abovementioned operation. In this anomaly pattern, scrupulous attention is required to remove the suprapancreatic lymph nodes because the portal vein is located immediately dorsal to those lymph nodes and is at increased risk for the injury in this situation. The common hepatic artery is branched from the left gastric artery, and the hepatic perfusion from the superior mesenteric artery is not present in group 26. Planning to preserve the artery will improve safety when it is possible oncologically. There were no postoperative complications, and the patient was discharged 9 days after the operation. To our knowledge, the present case is the first reported case of a laparoscopic distal gastrectomy with D2 lymph node dissection with an Adachi type VI (group 26) vascular anomaly. Preoperative diagnostic imaging is very important to prevent surgical complications because the reliable identification of vascular anomaly during an operation is very difficult. PMID:27259578

  10. Correlations in a band insulator

    Czech Academy of Sciences Publication Activity Database

    Sentef, M.; Kuneš, Jan; Werner, P.; Kampf, A. P.

    2009-01-01

    Roč. 80, č. 15 (2009), 155116/1-155116/7. ISSN 1098-0121 Institutional research plan: CEZ:AV0Z10100521 Keywords : electronic correlations * dynamical mean-field theory * band insulator Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 3.475, year: 2009

  11. Band structure and nuclear dynamics

    International Nuclear Information System (INIS)

    The relation between the Variable Moment of Inertia model and the Interacting Boson Model are discussed from a phenomenological viewpoint. New results on ground state mean-square radii in nuclei far from stability are reported, and a discussion of band structure extending to high angular momentum states and methods of extracting information on the underlying dynamics is given

  12. Metaphyseal bands in osteogenesis imperfecta

    International Nuclear Information System (INIS)

    An increasing number of patients with osteogenesis imperfecta are undergoing pamidronate therapy to prevent the incidence of fragility fractures. The authors herein report a child aged 3 years who received five cycles of pamidronate, resulting in metaphyseal bands, known as “zebra lines.”

  13. Tolerance bands for functional data.

    Science.gov (United States)

    Rathnayake, Lasitha N; Choudhary, Pankaj K

    2016-06-01

    Often the object of inference in biomedical applications is a range that brackets a given fraction of individual observations in a population. A classical estimate of this range for univariate measurements is a "tolerance interval." This article develops its natural extension for functional measurements, a "tolerance band," and proposes a methodology for constructing its pointwise and simultaneous versions that incorporates both sparse and dense functional data. Assuming that the measurements are observed with noise, the methodology uses functional principal component analysis in a mixed model framework to represent the measurements and employs bootstrapping to approximate the tolerance factors needed for the bands. The proposed bands also account for uncertainty in the principal components decomposition. Simulations show that the methodology has, generally, acceptable performance unless the data are quite sparse and unbalanced, in which case the bands may be somewhat liberal. The methodology is illustrated using two real datasets, a sparse dataset involving CD4 cell counts and a dense dataset involving core body temperatures. PMID:26574904

  14. A PHOTONIC BAND GAP FIBRE

    DEFF Research Database (Denmark)

    1999-01-01

    An optical fibre having a periodicidal cladding structure provididing a photonic band gap structure with superior qualities. The periodical structure being one wherein high index areas are defined and wherein these are separated using a number of methods. One such method is the introduction of...

  15. Band gap ion mass filter

    International Nuclear Information System (INIS)

    Ions in a plasma may be radially separated according to mass using a combination of an axial magnetic field and either a radial or azimuthal electric field. The separation is qualitatively different from that obtained by a plasma centrifuge and the characteristics of confined and unconfined ion orbits are analogous to the phenomenon of band gaps in semiconductors

  16. Numerical and Experimental Study of Producing Flanges on Hollow Parts by Extrusion with a Movable Sleeve / Badania Teoretyczno-Doświadczalne Procesu Wyciskania Z Zastosowaniem Ruchomej Tulei Kołnierza We Wsadach Drążonych

    Directory of Open Access Journals (Sweden)

    Gontarz A.

    2015-12-01

    Full Text Available The paper presents the numerical and experimental results of a new method for producing flanges on hollow parts. With this new method, the flange is extruded by a movable sleeve. This innovative technique is modelled numerically by the finite element method. The effect of workpiece and finished product geometries on the forming process is investigated and failure modes are identfied. The numerical reults are then verified in experiments. The tests are conducted using a three-slide forging press equipped with a special device. The numerical and experimental results show a good agreement, which proves that the developed method is correct.

  17. Linear methods in band theory

    DEFF Research Database (Denmark)

    Andersen, O. Krogh

    1975-01-01

    Two approximate methods for solving the band-structure problem in an efficient and physically transparent way are presented and discussed in detail. The variational principle for the one-electron Hamiltonian is used in both schemes, and the trial functions are linear combinations of energy......-independent augmented plane waves (APW) and muffin-tin orbitals (MTO), respectively. The secular equations are therefore eigenvalue equations, linear in energy. The trial functions are defined with respect to a muffin-tin (MT) potential and the energy bands depend on the potential in the spheres through potential...... parameters which describe the energy dependence of the logarithmic derivatives. Inside the spheres, the energy-independent APW is that linear combination of an exact solution, at the arbitrary but fixed energy Eν, and its energy derivative which matches continuously and differentiably onto the plane...

  18. ALMA Band 5 Cartridge Performance

    Science.gov (United States)

    Billade, Bhushan; Lapkin, I.; Nystrom, O.; Sundin, E.; Fredrixon, M.; Finger, R.; Rashid, H.; Desmaris, V.; Meledin, D.; Pavolotsky, A.; Belitsky, Victor

    2010-03-01

    Work presented here concerns the design and performance of the ALMA Band 5 cold cartridge, one of the 10 frequency channels of ALMA project, a radio interferometer under construction at Atacama Desert in Chile. The Band 5 cartridge is a dual polarization receiver with the polarization separation performed by orthomode transducer (OMT). For each polarization, Band 5 receiver employs sideband rejection (2SB) scheme based on quadrature layout, with SIS mixers covering 163-211 GHz with 4-8 GHz IF. The LO injection circuitry is integrated with mixer chip and is implemented on the same substrate, resulting in a compact 2SB assembly. Amongst the other ALMA bands, the ALMA Band 5 being the lowest frequency band that uses all cold optics, has the largest mirror. Consequently, ALMA Band 5 mirror along with its support structure leaves very little room for placing OMT, mixers and IF subsystems. The constraints put by the size of cold optics and limited cartridge space, required of us to revise the original 2SB design and adopt a design where all the components like OMT, mixer, IF hybrid, isolators and IF amplifier are directly connected to each other without using any co-ax cables in-between. The IF subsystem uses the space between 4 K and 15 K stage of the cartridge and is thermally connected to 4 K stage. Avoiding co-ax cabling required use of custom designed IF hybrid, furthermore, due to limited cooling capacity at 4 K stage, resistive bias circuitry for the mixers is moved to 15 K stage and the IF hybrid along with an integrated bias-T is implemented using superconducting micro-strip lines. The E-probes for both LO and RF waveguide-to-microstrip transitions are placed perpendicular to the wave direction (back-piece configuration). The RF choke at the end of the probes provides a virtual ground for the RF/LO signal, and the choke is DC grounded to the chassis. The on-chip LO injection is done using a microstrip line directional coupler with slot-line branches in the

  19. NCenter wide band neutrino beam

    International Nuclear Information System (INIS)

    This memo describes the physical properties of the currently operating N-Center wide band neutrino beam---commonly called the triplet train, following a past tradition of a triplet lens configuration. In reality, in order to gain a larger momentum acceptance and to minimize the angular divergence of the beam, a quadruplet beam (4 lenses) employing point-to-parallel optics at a central momentum of 300 GeV was built. 6 refs., 13 figs., 1 tab

  20. Shear Banding of Complex Fluids

    OpenAIRE

    Divoux, Thibaut; Fardin, Marc-Antoine; Manneville, Sebastien; Lerouge, Sandra

    2015-01-01

    Even in simple geometries many complex fluids display non-trivial flow fields, with regions where shear is concentrated. The possibility for such shear banding has been known since several decades, but the recent years have seen an upsurge of studies offering an ever more precise understanding of the phenomenon. The development of new techniques to probe the flow on multiple scales and with increasing spatial and temporal resolution has opened the possibility for a synthesis of the many pheno...

  1. Band-selective radiofrequency pulses

    Science.gov (United States)

    Geen, Helen; Freeman, Ray

    A theoretical treatment is given of the general problem of designing amplitude-modulated radiofrequency pulses that will excite a specified band of frequencies within a high-resolution NMR spectrum with uniform intensity and phase but with negligible excitation elsewhere. First a trial pulse envelope is defined in terms of a finite Fourier series and its frequency-domain profile calculated through the Bloch equations. The result is compared with the desired target profile to give a multidimensional error surface. The method of simulated annealing is then used to find the global minimum on this surface and the result refined by standard gradient-descent optimization. In this manner, a family of new shaped radio-frequency pulses, known as BURP ( band-selective, uniform response, pure-phase) pulses, has been created. These are of two classes—pulses that excite or invert z magnetization and those that act as general-rotation πr/2 or π pulses irrespective of the initial condition of the nuclear magnetization. It was found convenient to design the latter class as amplitude-modulated time-symmetric pulses. Tables of Fourier coefficients and pulse-shape ordinates are given for practical implementation of BURP pulses, together with the calculated frequency-domain responses and experimental verifications. Examples of the application of band-selective pulses in conventional and multidimensional spectroscopy are given. Pure-phase pulses of this type should also find applications in magnetic resonance imaging where refocusing schemes are undesirable.

  2. 过共晶铝硅合金缸体/缸套工作面加工技术及应用%Working face machining technique and application of hypereutectic silicon aluminium alloy engine cylinder/cylinder sleeve

    Institute of Scientific and Technical Information of China (English)

    孙廷富; 杨波; 翟景; 郭安振; 郭锋; 崔崇亮

    2013-01-01

    综述了低过共晶铝硅合金、中过共晶铝硅合金以及高过共晶铝硅合金缸体/缸套材料的研究及进展情况,详细叙述了缸体孔/缸套工作面激光合金化、激光刻蚀、珩磨加工、等离子体涂覆、化学腐蚀等加工技术,对存在的问题进行分析总结,并提出解决方法。%Research progress of low hypereutectic silicon,medium hypereutectic silicon or high hypereutectic silicon aluminium alloy cylinder/cylinder sleeve is summarized. The machining techniques for cylinder hole and working face of cylinder sleeve such as laser alloying,laser ablation,honing,plasma coating,chemical corrosion and so on are introduced in detail. The existing problems are analysed and the resolving methods are put forward.

  3. Design of smooth orthogonal wavelets with beautiful structure from 2-band to 4-band

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    A complete algorithm to design 4-band orthogonal wavelets with beautiful structure from 2-band orthogonal wavelets is presented. For more smoothness, the conception of transfer vanishing moment is introduced by transplanting the requirements of vanishing moment from the 4-band wavelets to the 2-band ones. Consequently, the design of 4-band orthogonal wavelets with P vanishing moments and beautiful structure from 2-band ones with P transfer vanishing moments is completed.

  4. 胃癌D2根治术后迟发性出血的临床分析及防治%Analysis and prevention of postoperative delayed hemorrhage associated with radical D2 gastrectomy

    Institute of Scientific and Technical Information of China (English)

    王君辅; 谢勇; 胡林; 李昌荣; 李伟峰; 李红浪

    2016-01-01

    目的:探讨胃癌D2根治术后迟发性出血的原因、处理方法及预后防治。方法:回顾性分析南昌大学第二附属医院2015年1月至2015年10月294例胃癌D2根治患者的临床资料。结果:15例患者手术后发生迟发性大出血,占同期患者的5.1%(15/294),其中腹腔镜下胃癌根治术9例、开腹胃癌根治术6例;大血管出血7例,吻合口漏、吻合口溃疡致出血3例,十二指肠残端破裂致出血2例,其他部位出血2例,部位不明1例。11例经二次手术,2例经数字减影血管造影(digital subtraction angiography,DSA)+经导管介入下动脉栓塞(transcathete arterial embolization,TAE)止血,1例经内镜下止血,1例经保守治疗,二次手术率73.3%(11/15),死亡率40%(6/15),治愈率60%(9/15)。结论:胃癌D2根治术后迟发性出血二次手术率及死亡率较高,临床中需综合患者出血情况及原因积极采取治疗。重大血管出血、吻合口漏、吻合口溃疡、十二指肠残端破裂是最重要危险因素,腹腔动脉性出血及吻合口漏并发症引起出血是最主要致死原因。对于出血量大,生命体征不稳定患者应及时行二次手术和腹腔引流术为有效的处理方法;对于生命体征平稳,出血量少患者可行保守治疗;对于单纯吻合口溃疡出血患者可采取内镜下止血;对于出血部位不明患者可行DSA明确出血部位,再行TAE治疗。%Objective:To investigate the cause, treatment, and prognosis of delayed hemorrhage in patients who underwent radical gastrectomy. Methods:The clinical data of 294 patients who underwent radical gastrectomy in the Second Hospital Affiliated from Nanchang University from January 2015 to October 2015 were retrospectively analyzed. Results:A total of 15 patients suffered from delayed hemorrhage and accounted for 5.1%of the gastric cancer cases in our hospital for the same period of radical

  5. Relativistic Model for two-band Superconductivity

    OpenAIRE

    Ohsaku, Tadafumi

    2003-01-01

    To understand the superconductivity in MgB2, several two-band models of superconductivity were proposed. In this paper, by using the relativistic fermion model, we clearize the effect of the lower band in the superconductivity.

  6. Bonds and bands in semiconductors

    CERN Document Server

    Phillips, Jim

    2009-01-01

    This classic work on the basic chemistry and solid state physics of semiconducting materials is now updated and improved with new chapters on crystalline and amorphous semiconductors. Written by two of the world's pioneering materials scientists in the development of semiconductors, this work offers in a single-volume an authoritative treatment for the learning and understanding of what makes perhaps the world's most important engineered materials actually work. Readers will find: --' The essential principles of chemical bonding, electron energy bands and their relationship to conductive and s

  7. Identification of the UIR bands

    Science.gov (United States)

    Johnson, Fred M.

    2016-06-01

    Starlight undergoing multiple scattering processes within fluffy grains results in extinction, UV 2175A bump, DIBs and the UIR bands. Spectroscopic lab and DIB data has identified the highly fluorescent molecule Dipyridyl Magnesium Tetrabenzoporphyrin (MgTBP). Reflection and Raman scattering experimental data will be presented which designates this molecule as the primary source for UIR signals. MgTBP sublimes at about 500OC. It is produced via high temperature plasma synthesis within and subsequently ejected from comets which in turn are by-products of solar system-planetary development. Interstellar dust is the left-over refuse which implies prodigious solar system evolution in each galaxy.

  8. Interface energy of two band superconductors

    OpenAIRE

    Geyer, Jani; Fernandes, Rafael M.; Kogan, V. G.; Schmalian, Jörg

    2010-01-01

    Using the Ginzburg-Landau theory for two-band superconductors, we determine the surface energy, sigma_s, between coexisting normal and superconducting states at the thermodynamic critical magnetic field. Close to the transition temperature, where the Ginzburg-Landau theory is applicable, we demonstrate that the two-band problem maps onto an effective single band problem. While the order parameters of the two bands may have different amplitudes in the homogeneous bulk, near the critical temper...

  9. Black Scholes’ model and Bollinger bands

    Science.gov (United States)

    Liu, Wei; Huang, Xudong; Zheng, Weian

    2006-11-01

    Bollinger bands are well-known in stock market as a popular technical analysis tool. We found that Black-Scholes stock price model had this Bollinger bands property also. In this paper, we give the proof of this phenomenon, and give a new distribution of a statistics generated by the Bollinger bands.

  10. High-energy band structure of gold

    DEFF Research Database (Denmark)

    Christensen, N. Egede

    1976-01-01

    The band structure of gold for energies far above the Fermi level has been calculated using the relativistic augmented-plane-wave method. The calculated f-band edge (Γ6-) lies 15.6 eV above the Fermi level is agreement with recent photoemission work. The band model is applied to interpret...

  11. Role of Helicobacter pylori in stomach cancer after partial gastrectomy for benign ulcer disease Papel del Helicobacter pylori en el cáncer gástrico tras gastrectomía parcial por úlcera benigna

    Directory of Open Access Journals (Sweden)

    A. Seoane

    2005-11-01

    Full Text Available Objective: to determine the prevalence of Helicobacter pylori infection in patients having undergone gastrectomy for non-neoplastic disease who later developed gastric stump cancer. Material and methods: retrospective study of all patients with partial gastrectomy for non-malignant peptic disease who were submitted to an endoscopic exploration between 1995 and 2001. A comparison was made of major clinical and histological characteristics, and the presence of Helicobacter pylori among patients with and without gastric cancer in the stomach remnant. Results: a total of 73 patients were studied in this period. Fifteen patients (20.5% had remnant-stump gastric cancer. All but one were adenocarcinomas (71% intestinal and 29% diffuse, respectively. The average time between diagnosis of gastric cancer and previous gastrectomy was 32 (14-48 years. There was a higher detection rate of Helicobacter pylori in patients with cancer in the gastric remnant (100 vs. 81.5%, respectively, p Objetivo: determinar la prevalencia de la infección por Helicobacter pylori en pacientes gastrectomizados por enfermedad no neoplásica, y que han desarrollado posteriormente cáncer gástrico. Material y métodos: estudio retrospectivo con reclutamiento de todos los pacientes con gastrectomía parcial por enfermedad péptica benigna que han sido sometidos a una exploración endoscópica entre 1995-2001. Se ha realizado una comparación de las principales características clínicas e histológicas y de la presencia de Helicobacter pylori en los pacientes con y sin cáncer del remanente gástrico. Resultados: se han estudiado un total de 73 pacientes en este periodo. Se han encontrado 15 pacientes (20,5% con cáncer en el remanente gástrico, 14 adenocarcinomas (71% tipo intestinal y 29% tipo difuso y un linfoma. El tiempo transcurrido entre el diagnóstico de cáncer gástrico y la gastrectomía previa ha sido de 32 (14-48 años. Se ha detectado un alto porcentaje de infecci

  12. Reconfigurable L-Band Radar

    Science.gov (United States)

    Rincon, Rafael F.

    2008-01-01

    The reconfigurable L-Band radar is an ongoing development at NASA/GSFC that exploits the capability inherently in phased array radar systems with a state-of-the-art data acquisition and real-time processor in order to enable multi-mode measurement techniques in a single radar architecture. The development leverages on the L-Band Imaging Scatterometer, a radar system designed for the development and testing of new radar techniques; and the custom-built DBSAR processor, a highly reconfigurable, high speed data acquisition and processing system. The radar modes currently implemented include scatterometer, synthetic aperture radar, and altimetry; and plans to add new modes such as radiometry and bi-static GNSS signals are being formulated. This development is aimed at enhancing the radar remote sensing capabilities for airborne and spaceborne applications in support of Earth Science and planetary exploration This paper describes the design of the radar and processor systems, explains the operational modes, and discusses preliminary measurements and future plans.

  13. DUAL-BAND INFRARED DETECTORS

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    As the infrared technology continues to advance, there is a growing demand for multispectral detectors for advanced IR systems with better target discrimination and identification. Both HgCdTe detectors and quantum well GaAs/AlGaAs photodetectors offer wavelength flexibility from medium wavelength to very long wavelength and multicolor capability in these regions. The main challenges facing all multicolor devices are more complicated device structtures, thicker and multilayer material growth, and more difficult device fabrication, especially when the array size gets larger and pixel size gets smaller. In the paper recent progress in development of two-color HgCdTe photodiodes and quantum well infrared photodetectors is presented.More attention is devoted to HgCdTe detectors. The two-color detector arrays are based upon an n-P-N (the capital letters mean the materials with larger bandgap energy) HgCdTe triple layer heterojunction design. Vertically stacking the two p-n junctions permits incorporation of both detectros into a single pixel. Both sequential mode and simultaneous mode detectors are fabricated. The mode of detection is determined by the fabrication process of the multilayer materials.Also the performances of stacked multicolor QWIPs detectors are presented. For multicolor arrays, QWIP's narrow band spectrum is an advantage, resulting in low spectral crosstalk. The major challenge for QWIP is developing broadband or multicolor optical coupling structures that permit efficient absorption of all required spectral bands.

  14. Fatal pulmonary thromboembolism in gastrectomy intraoperative procedures by gastric adenocarcinoma: case report Tromboembolismo pulmonar fatal no intra-operatório de gastrectomia por adenocarcinoma gástrico: relato de caso

    Directory of Open Access Journals (Sweden)

    Cláudio Bresciani

    1999-08-01

    Full Text Available The case of a patient with gastric adenocarcinoma with indication for gastrectomy is reported. The surgery took place without complications. A palliative, subtotal gastrectomy was performed after para-aortic lymph nodes compromised by neoplasm were found, which was confirmed by pathological exam of frozen sections carried out during the intervention. At the end of the gastroenteroanastomosis procedure, the patient began to show intense bradycardia: 38 beats per minute (bpm, arterial hypotension, changes in the electrocardiogram's waveform (upper unlevelling of segment ST, and cardiac arrest. Resuscitation maneuvers were performed with temporary success. Subsequently, the patient had another circulatory breakdown and again was recovered. Finally, the third cardiac arrest proved to be irreversible, and the intra-operative death occurred. Necropsy showed massive pulmonary embolism. The medical literature has recommended heparinization of patients, in an attempt to avoid pulmonary thromboembolism following major surgical interventions. However, in the present case, heparinization would have been insufficient to prevent death. This case indicates that it is necessary to develop preoperative propedeutics for diagnosing the presence of venous thrombi with potential to migrate, causing pulmonary thromboembolism (PTE. If such thrombi could be detected, preventative measures, such as filter installation in the Cava vein could be undertaken.Relata-se um caso de paciente com adenocarcinoma gástrico com indicação de gastrectomia. O ato operatório transcorreu sem anormalidades. Foi realizada gastrectomia subtotal paliativa, pois encontrou-se linfonodos para-aórticos comprometidos pela neoplasia, confirmado por exame anátomo-patológico de congelação realizado no decorrer da intervenção. Ao fim da confecção da gastroêntero-anastomose o paciente passou a apresentar bradicardia intensa: 38 batimentos por minuto (bpm, hipotensão arterial, altera

  15. The effect of early enteral nutrition plus parenteral nutrition on short-term outcomes after radical gastrectomy%胃癌术后早期肠内营养联合肠外营养的近期效果

    Institute of Scientific and Technical Information of China (English)

    刘琳

    2015-01-01

    Objective: to compare the short-term effects of early enteral nutrition plus parenteral nutrition with those of early total parenteral nutrition on postoperative outcomes of gastric cancer and evaluate the effects on health economics. Method: 40 patients who underwent radical gastrectomy were randomly divided into two groups of early enteral nutrition plus parenteral nutrition and early total parenteral nutrition. the level of blood nutrition indicators was determined 7 days after surgery and anal exhaust time, complications, length of hospital stay and hospitalization cost were observed and analyzed between two groups. Results: the gradually early enteral nutrition plus parenteral nutrition which had a low intolerance rate shortened anal exhaust time, postoperative hospital stay and total hospitalization time, reduced the total hospitalization cost comparing with total parenteral nutrition. Conclusion: Gradually early enteral nutrition plus parenteral nutrition is well tolerated after 24 hours of radical gastrectomy and has better effect on health economics compared with early total parenteral nutrition.%目的:探讨早期肠内营养联合肠外营养以及早期完全肠外营养对胃癌术后患者近期临床结局的影响,并进行卫生经济学效果评价。方法选取胃癌根治术后患者40例,随机分为早期肠内营养联合肠外营养组和早期完全肠外营养组;记录并比较两组肛门排气/排便时间、术后7天营养指标、术后并发症发生率、术后住院时间、总住院时间、总住院费用。结果术后24小时渐进式肠内营养联合肠外营养不耐受率低;与早期完全肠外营养相比,明显缩短了肛门排气/排便时间,缩短了术后住院时间与总住院时间,减少了总住院费用。结论胃癌根治术后24小时实施渐进式早期肠内营养联合肠外营养耐受性好,与早期完全肠外营养相比具有更好的卫生经济效果。

  16. Thematic mapper studies band correlation analysis

    Science.gov (United States)

    Ungar, S. G.; Kiang, R.

    1976-01-01

    Spectral data representative of thematic mapper candidate bands 1 and 3 to 7 were obtained by selecting appropriate combinations of bands from the JSC 24 channel multispectral scanner. Of all the bands assigned, only candidate bands 4 (.74 mu to .80 mu) and 5 (.80 mu to .91 mu) showed consistently high intercorrelation from region to region and time to time. This extremely high correlation persisted when looking at the composite data set in a multitemporal, multilocation domain. The GISS investigations lend positive confirmation to the hypothesis, that TM bands 4 and 5 are redundant.

  17. Endoscopic Treatment of an extruded gastric band

    International Nuclear Information System (INIS)

    We present the case of a patient in whom a gastric band was placed for the treatment of morbid obesity with good results of loss of weight. One year after the procedure the gastric band started to be extruded into the stomach and this was almost total at 26 months. At this time the band was held only by a small tissue bridge. We did two endoscopic procedures to extract the band. In the first one the tissue bridge was cut using the duodenoscope for a better vision and handling and a needle knife papilotome. The band could not be extracted at the time because it continued to be fixed by the connector to the subcutaneous reservoir. The reservoir had been previously removed. One week later in a second procedure the band was cut using a monofilament biliary wire guide and lithotriptor. Then the band could be extracted easily. We describe the procedures, the difficulties we had and how we resolved them

  18. Table of members of quasi-bands

    International Nuclear Information System (INIS)

    The probable members of the quasi-bands in even-even nuclei for Z between 6 and 100 are listed in this table. The terms quasi-bands have been introduced in the so-called spherical regions as the counter parts of the collective bands in the deformed regions. In the present compilation, the data for deformed nuclei are classified for convenience under the same titles, Quasi-Ground Band, Quasi-Beta Band and Quasi-Gamma Band, as are used for other nuclear regions. The present edition covers the literature through September, 1983. Fifteen newly discovered nuclides are included. The classification of energy level into quasi-bands is made on the basis of the systematic trend in the data over large groups of nuclei. (Kato, T.)

  19. Photonic band gap structure simulator

    Science.gov (United States)

    Chen, Chiping; Shapiro, Michael A.; Smirnova, Evgenya I.; Temkin, Richard J.; Sirigiri, Jagadishwar R.

    2006-10-03

    A system and method for designing photonic band gap structures. The system and method provide a user with the capability to produce a model of a two-dimensional array of conductors corresponding to a unit cell. The model involves a linear equation. Boundary conditions representative of conditions at the boundary of the unit cell are applied to a solution of the Helmholtz equation defined for the unit cell. The linear equation can be approximated by a Hermitian matrix. An eigenvalue of the Helmholtz equation is calculated. One computation approach involves calculating finite differences. The model can include a symmetry element, such as a center of inversion, a rotation axis, and a mirror plane. A graphical user interface is provided for the user's convenience. A display is provided to display to a user the calculated eigenvalue, corresponding to a photonic energy level in the Brilloin zone of the unit cell.

  20. Variants of lumbosacral elastic band.

    Directory of Open Access Journals (Sweden)

    Carlos Cesar Santín Alfaro

    2011-06-01

    Full Text Available It is made an intervention research, qualitative and quantitative of two variants of lumbosacral elastic bands used in Provincial Laboratory of Technical Orthopedics in Sancti Spiritus Province, taking into account the high demand for this device and that the laboratory do not often count with the raw material needed for the original lumbosacral belt made by denim cloth which is the conventional belt. The main goal of this research is to explain the technological process and to compare the cost of production of both elastic variants with lumbosacral belt made by cloth which are offer to patients who look for this service , giving them a rapid solution so that they can feel comfortable.

  1. 阴茎中部无针麻醉袖套式包皮环切治疗包皮过长%Mid-Penis Sleeve Circumcision with Needle-Free Jet Anaesthesia for the treatment of patients with redundant prepuce

    Institute of Scientific and Technical Information of China (English)

    张伟; 申岩; 杨文增; 穆银静; 崔振宇

    2011-01-01

    Objectives To investigate mid-penis sleeve circumcision with needle-free jet anaesthesia for the treatment of patients with redundant prepuce and observe the therapeutic effect.Methods Methods outpatient circumcision 80 cases with DPNB(dorsal of penis nerve blocked)anaesthesia were randomly divided into two groups,group A(40 cases)was underwent mid-penis sleeve circumcision with needle-free jet anaesthesia,group B(40cases)was done dorsal slit circumcision with traditional DPNB,to study the difference in Anaesthetic Volume,the time of take effect,visual analogue scale(VAS),bleeding voluroue,the condition of foreskin hydropsia,operative incision healing.appearance satisfication percentage.Results Group A has statistical difference to Group B in all ahove mentioned index.Conclusions Mid-penis sleeve circumcision with needle-free jet anaesthesia has many advantages over the dorsal slit circumcision with traditional DPNB,deserving generally clinical application.%目的 探讨阴攀中部无针麻醉袖套式包皮环切治疗包皮过长的效果.方法 选择包皮过长患者105例,随机分成A,B两组,A组40例,行阴茎中部无针麻醉袖套式包皮环切术,8组40例行传统阻滞麻醉及背侧切开环切术.对两组在麻醉剂量、起效时间、视觉模拟麻醉疼痛评分、出血量、水肿、切口愈合、外观满意度等方面进行比较.结果两组所有对比项目在两组之间的差异均有统计学意义.结论 阴茎中部无针麻醉袖套式包皮切除治疗包皮过长比传统阻滞麻醉及背侧切开环切术更具有优越性,值得临床推广.

  2. Analyzing Thick-Section Composites Lug with Hole Containing Boundary Sleeve%含孔边套筒的厚截面复合材料接头耳片强度分析

    Institute of Scientific and Technical Information of China (English)

    冯蕴雯; 曹勇; 魏宇宏; 薛小锋

    2015-01-01

    A finite element( FE) modeling method with cohesive interface and sublaminates was proposed to study interlaminar stress distribution and strength of thick-section composite materials lug.And numerical calculation was carried out on the thick composite laminates three-point bending problem; effectiveness of modeling method for thick-section composite materials stress calculation was verified, Based on this, a three dimensional(3D) FE model of thick-section composite materials lug is designed;then the 3D stress distribution along the hole edge and failure mode of the lug subjected to axial load are discussed.The results and their analysis show preliminarily that:( 1) the failure stress and damage position are mainly concentrated in the no contact region of the hole-axis; stiffer metal sleeves reduce the interlaminar stress concentrations of hole edge, however, this and higher radial tensile stresses in the region lead to reduced carrying capacity of the sleeves adhesive; ( 2 ) the adhesive of sleeves fails before the thick-section composites lug; this destroyed the integrity of the protective structure and will adversely affect the strength of the thick-section composites lug.%为研究含孔边防护套筒的厚截面复合材料层合板耳片连接件孔边层间应力分布规律及接头强度,提出了采用层合板子层和界面胶层相结合的有限元建模方法,在验证了建模方法对厚截面层合板应力求解的有效性的基础上,分析了承受轴向载荷的厚层合板耳片连接件孔边三维应力分布及接头失效情况。结果表明:套筒胶层的破坏应力和破坏位置主要集中在孔轴非接触区;当套筒胶层发生断裂时,厚截面层合板并未发生失效,限制了厚板接头耳片整体强度性能的提高。

  3. Sleeve Valve Pipe Miscellaneous Fill in the Foundation Seepage Control and Reinforcement%袖阀管注浆法在杂填土地基防渗加固中的应用

    Institute of Scientific and Technical Information of China (English)

    张家柱

    2013-01-01

    袖阀管注浆法通过特殊的工艺分段、分次、间歇、定量地将水泥浆液注入杂填土地层的孔隙和松散层中,被加固土体通过水泥浆液的相互作用形成了上下连续且相对密实稳定的固结体,从而使得被加固土体的密实度增大、压缩性降低、抗渗性能提高,增强了地基土的整体性和防渗能力。介绍了袖阀管注浆加固作用机理、袖阀管注浆法施工过程及质量控制要点,该方法在某防洪墙工程基础底面以下杂填土地基防渗问题处理中的应用情况:工程施工完成后经两次洪水考验,防洪墙后未发生渗水、管涌和其他险情,加固效果显著;该方法加固处理后的杂填土地层的防渗效果显著,满足设计要求。%Sleeve valve pipe grouting section,through special process and intermittent,quantitatively injects the cement grout into mixed backfill layer porosity and loose layer,reinforced soil cement slurry through the interaction and the formation of consolidation body becomes continuous and relatively dense and stable,so that by soil compaction degree increase,compressibility is reduced,anti permeability increased,enhanced soil in-tegrity and anti-seepage capacity. The sleeve valve pipe grouting reinforcement mechanism,the sleeve valve pipe grouting construction process and control,This method in a flood the wall project of foundation bottom fill application processing problems of land based in the anti-seepage reinforce-ment show that:After the two flood,flood control wall without water seepage,piping and other dangerous situation,strengthening effect;the meth-od of reinforcement of miscellaneous fill soil anti-seepage effect is remarkable,and can meet the design requirements.

  4. Topics in topological band systems

    Science.gov (United States)

    Huang, Zhoushen

    The discovery of integer quantum Hall effect and its subsequent theoretical formulation heralded a new paradigm of thinking in condensed matter physics, which has by now blossomed into the rapidly growing field of topological phases. In this work we investigate several mutually related topics in the framework of topological band theory. In Chapter 2, we study solutions to boundary states on a lattice and see how they are related to the bulk topology. To elicit a real space manifestation of the non-trivial topology, the presence of a physical edge is not strictly necessary. We study two other possibilities, namely the entanglement spectrum associated with an imaginary spatial boundary, and the localization centers of Wannier functions, in Chapters 3,4, and 5. Topological classification through discrete indices is so far possible only for systems described by pure quantum states---in the existing scheme, quantization is lost for systems in mixed states. In Chapter 6, we present a program through which discrete topological indices can be defined for topological band systems at finite temperature, based on Uhlmann's parallel transport of density matrices. The potential of topologocal insulators in realistic applications lies in the existence of Dirac nodes on its surface spectrum. Dirac physics, however, is not exclusive to TI surfaces. In a recently discovered class of materials known as Weyl semimetals, energy nodes which emit linear dispersions also occur in the bulk material. In Chapter 7, we study the possibility of resonance states induced by localized impurities near the nodal energy in Weyl semimetals, which will help us in understanding the stability of density-of-state suppression at the energy nodes. Finally, in Chapter 8, we apply the topological characterization developed for noninteracting particles to a class of interacting spin models in 3D, which are generalizations of Kitaev's honeycomb model, and identify several exotic quantum phases such as spin

  5. Diagnosis and treatment of anastomotic stoma leakage after laproscopic radical gastrectomy%腹腔镜胃癌根治术后吻合口漏的诊断与治疗

    Institute of Scientific and Technical Information of China (English)

    刘金钢; 孙威

    2015-01-01

    Clinical data have confirmed the advantages of laproscopic radical gastrectomy ( LRG) such as mini-invasion and rapid recovery.Consequently, LRG has become more and more popular in treating gastric cancer with expanded indications in recent years.But the complications of LRG are marked, for example, anastomotic stoma leakage.This paper is to review the literature about diagnosis and treatment of anastomotic stoma leakage after LRG.%大量的临床观察结果表明,腹腔镜胃癌根治术具有手术创伤小、术后康复快速等优点。因此,腹腔镜胃癌根治术的手术例数逐年增加,治疗谱不断扩大,已被广泛的接受。随之,腹腔镜胃癌根治术的并发症问题便渐受关注。尤其是吻合口漏。本文便结合文献对腹腔镜胃手术吻合口漏的诊断及治疗做一阐述。

  6. Topological Raman band in the carbon nanohorn.

    Science.gov (United States)

    Sasaki, Ken-ichi; Sekine, Yoshiaki; Tateno, Kouta; Gotoh, Hideki

    2013-09-13

    Raman spectroscopy has been used in chemistry and physics to investigate the fundamental process involving light and phonons. The carbon nanohorn introduces a new subject to Raman spectroscopy, namely topology. We show theoretically that a photoexcited carrier with a nonzero winding number activates a topological D Raman band through the Aharonov-Bohm effect. The topology-induced D Raman band can be distinguished from the ordinary D Raman band for a graphene edge by its peak position. PMID:24074113

  7. Coherent band pathways between knots and links

    CERN Document Server

    Buck, Dorothy

    2014-01-01

    We categorise coherent band (aka nullification) pathways between knots and 2-component links. Additionally, we characterise the minimal coherent band pathways (with intermediates) between any two knots or 2-component links with small crossing number. We demonstrate these band surgeries for knots and links with small crossing number. We apply these results to place lower bounds on the minimum number of recombinant events separating DNA configurations, restrict the recombination pathways and determine chirality and/or orientation of the resulting recombinant DNA molecules.

  8. Possible chiral bands in 194Tl

    International Nuclear Information System (INIS)

    High spin states in 194Tl, excited through the 181Ta(18O,5n) fusion evaporation reaction, were studied using the AFRODITE array at iThemba LABS. Candidate chiral bands built on the πh9/2 x νi13/21 configuration were found. Furthermore these bands were observed through a band crossing caused by the excitation of a νi13/2 pair. Above the band crossing the excitation energies remain close, suggesting that chirality may persist for the four quasiparticle configuration too.

  9. Flat-band engineering of mobility edges

    Science.gov (United States)

    Danieli, Carlo; Bodyfelt, Joshua D.; Flach, Sergej

    2015-06-01

    Properly modulated flat-band lattices have a divergent density of states at the flat-band energy. Quasiperiodic modulations are known to host a metal-insulator transition already in one space dimension. Their embedding into flat-band geometries consequently allows for a precise engineering and fine tuning of mobility edges. We obtain analytic expressions for singular mobility edges for two flat-band lattice examples. In particular, we engineer cases with arbitrarily small energy separations of mobility edge, zeroes, and divergencies.

  10. TYPE II DIABETES MELLITUS: MEDICAL OR SURGICAL DISEASE ?

    Directory of Open Access Journals (Sweden)

    G. Silecchia

    2009-02-01

    Full Text Available The incidence of type II diabetes mellitus (T2DM is increasing in all the world. In this way the comorbidities and complications of the T2DM as well as death related T2DM are also increasing. It was demonstrated by many studies that T2DM is a medically incurable disease, chronic and progressive, and despite all the medical therapy and life style changing, more than 20% from the patients have a poor glycemic control. On the other hand, some surgical procedures, initially performed for morbid obesity (bariatric surgery revealed good results to control the diabetes and even the metabolic syndrome. This paper presents the advantages and disadvantages of three main surgical procedures: gastric by-pass, sleeve gastrectomy and gastric banding. All of these procedures are very effectiveness to control the diabetes and metabolic syndrome. Further studies are necessary to establish the guidelines for the treatment (and even prophylaxis of T2DM.

  11. Evidence supporting the need for bariatric surgery to address the obesity epidemic in the United States.

    Science.gov (United States)

    Bour, Eric S

    2015-01-01

    Despite aims at prevention, obesity in the United States is now an epidemic. Along with the rise in obesity, the United States has experienced a concomitant rise in obesity-related comorbidities. Furthermore overweight and obesity present a major economic public health challenge. Physicians are likely to recommend weight loss to their overweight patients. Diet, exercise, and behavior modification are often effective during the course of treatment but are subject to recidivism and post-treatment weight gain. Obesity intervention mandates that providers consider the need for surgery in many cases. The three most commonly performed weight loss surgical procedures in the United States include gastric banding, gastric bypass, and sleeve gastrectomy. Patients undergoing surgery lose considerable amounts of excess weight and experience marked improvement in many other obesity-related comorbidities. Surgery is a proven therapy for patients who do not respond to less invasive measures and should be considered mainstream therapy in the treatment of the obesity epidemic. PMID:25757004

  12. Comparison of X-Band, L-Band and C-Band Radar Images in Monitoring Subsidence in Agricultural Regions

    Science.gov (United States)

    Motagh, Mahdi; Haghshenas Haghighi, Mahmud; Shamshiri, Roghaye; Esmaeili, Mustapha

    2015-05-01

    The ongoing pattern of groundwater induced land subsidence in major valleys and agricultural regions of Iran has been recently documented by several studies (e.g. [1-4]) using C-band Interferometric Synthetic Aperture Radar (InSAR) observations. In this article we present the results of our research in which we evaluated the performance of C-band, L-band and X-band SAR data, using time-series method of small baseline subset (SBAS), to retrieve long time series of ground subsidence in agricultural regions in the country. Two major groundwater basins have been selected for this purpose: (1) Rafsanjan Valley in the Kerman province of central Iran and (2) Tehran Plain (capital of Iran). We also report on our experience using dualpolarimetry (HH/VV) X-band SAR data for Persistent Scatterer (PS) deformation analysis in natural terrains subject to high rate of deformation.

  13. Solid State KA-Band, Solid State W-Band and TWT Amplifiers Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Phase I of the proposal describes plans to develop a state of the art transmitter for the W-Band and KA -Band Cloud Radar system. Our focus will be concentrated in...

  14. Semiconductor resonator solitons above band gap

    OpenAIRE

    Taranenko, V. B.; Weiss, C. O.; Stolz, W.

    2001-01-01

    We show experimentally the existence of bright and dark spatial solitons in semiconductor resonators for excitation above the band gap energy. These solitons can be switched on, both spontaneously and with address pulses, without the thermal delay found for solitons below the band gap which is unfavorable for applications. The differences between soliton properties above and below gap energy are discussed.

  15. Solid state ku-band power amplifier

    Science.gov (United States)

    Bowers, H. C.; Lockyear, W. H.

    1972-01-01

    The design, fabrication, and testing of two types of IMPATT diode reflection amplifiers and a transmission amplifier are given. The Ku-band IMPATT diode development is discussed. Circuitry and electrical performance of the final version of the Ku-band amplifier is described. Construction details and an outline and mounting drawing are presented.

  16. Link adaptation in unlicensed radio bands

    NARCIS (Netherlands)

    Haartsen, Jaap C.; Schutter, George B.W.

    2005-01-01

    This paper presents a new collaborative mechanism for efficient coordination of radio communication devices, in particular addressing the unlicensed ISM band at 2.4 GHz. As the traffic in the ISM band is increasing tremendously, the potential for interference between uncoordinated devices is becomin

  17. Low-Noise Band-Pass Amplifier

    Science.gov (United States)

    Kleinberg, L.

    1982-01-01

    Circuit uses standard components to overcome common limitation of JFET amplifiers. Low-noise band-pass amplifier employs JFET and operational amplifier. High gain and band-pass characteristics are achieved with suitable choice of resistances and capacitances. Circuit should find use as low-noise amplifier, for example as first stage instrumentation systems.

  18. Maximizing band gaps in plate structures

    DEFF Research Database (Denmark)

    Halkjær, Søren; Sigmund, Ole; Jensen, Jakob Søndergaard

    2006-01-01

    Band gaps, i.e., frequency ranges in which waves cannot propagate, can be found in elastic structures for which there is a certain periodic modulation of the material properties or structure. In this paper, we maximize the band gap size for bending waves in a Mindlin plate. We analyze an infinite...

  19. Getting Elementary Students Involved in Band

    Science.gov (United States)

    Moore, Patience

    2009-01-01

    The author discusses getting elementary students involved in a band. The goals of an elementary band instructor should include introduction of good practice habits, working within an ensemble, and rehearsal procedures, along with the focusing on the essentials of music. Instructors should let students use the basic instruments: flute, clarinet,…

  20. Low band gap polymers for organic photovoltaics

    DEFF Research Database (Denmark)

    Bundgaard, Eva; Krebs, Frederik C

    2007-01-01

    Low band gap polymer materials and their application in organic photovoltaics (OPV) are reviewed. We detail the synthetic approaches to low band gap polymer materials starting from the early methodologies employing quinoid homopolymer structures to the current state of the art that relies...

  1. An Example of Suppression of Spurious Stop-Bands of EBG Band-Stop Filter

    OpenAIRE

    Dušan Nešić; Branko Kolundžija

    2011-01-01

    Based on the well known theory of infinite periodic structures, analytical theory of EBG (electromagnetic band gap) cells suppressing 6 higher (spurious) stop-bands is developed. Using such cells in a cascade the straight-forward procedure for design of the corresponding EBG band-stop filter is proposed, with possibility to control the width and the depth of the stop-band. The analytical theory is confirmed by the EM simulation of the filter realized in the microstrip technology.

  2. Signature and parity splitting in rotational bands and chiral bands. Double minimum potential model

    International Nuclear Information System (INIS)

    The effects of the signature and parity splitting in nuclear spectra and the properties of the chiral bands are analyzed basing on a one-dimensional Schrödinger equation with a double-minimum potential. Rotational bands in odd axial nuclei, alternating parity bands in even-even nuclei and the chiral bands in odd-odd nuclei are considered. The results obtained are discussed.

  3. Bulk band gaps in divalent hexaborides

    Energy Technology Data Exchange (ETDEWEB)

    Denlinger, Jonathan; Clack, Jules A.; Allen, James W.; Gweon, Gey-Hong; Poirier, Derek M.; Olson, Cliff G.; Sarrao, John L.; Bianchi, Andrea D.; Fisk, Zachary

    2002-08-01

    Complementary angle-resolved photoemission and bulk-sensitive k-resolved resonant inelastic x-ray scattering of divalent hexaborides reveal a >1 eV X-point gap between the valence and conduction bands, in contradiction to the band overlap assumed in several models of their novel ferromagnetism. This semiconducting gap implies that carriers detected in transport measurements arise from defects, and the measured location of the bulk Fermi level at the bottom of the conduction band implicates boron vacancies as the origin of the excess electrons. The measured band structure and X-point gap in CaB6 additionally provide a stringent test case for proper inclusion of many-body effects in quasi-particle band calculations.

  4. Extraction of Optimal Spectral Bands Using Hierarchical Band Merging Out of Hyperspectral Data

    Science.gov (United States)

    Le Bris, A.; Chehata, N.; Briottet, X.; Paparoditis, N.

    2015-08-01

    Spectral optimization consists in identifying the most relevant band subset for a specific application. It is a way to reduce hyperspectral data huge dimensionality and can be applied to design specific superspectral sensors dedicated to specific land cover applications. Spectral optimization includes both band selection and band extraction. On the one hand, band selection aims at selecting an optimal band subset (according to a relevance criterion) among the bands of a hyperspectral data set, using automatic feature selection algorithms. On the other hand, band extraction defines the most relevant spectral bands optimizing both their position along the spectrum and their width. The approach presented in this paper first builds a hierarchy of groups of adjacent bands, according to a relevance criterion to decide which adjacent bands must be merged. Then, band selection is performed at the different levels of this hierarchy. Two approaches were proposed to achieve this task : a greedy one and a new adaptation of an incremental feature selection algorithm to this hierarchy of merged bands.

  5. Analysis of the clinical effect of 42 cases of laparoscopy-assisted radical gastrectomy%腹腔镜辅助胃癌根治术42例临床效果分析

    Institute of Scientific and Technical Information of China (English)

    黎堃

    2014-01-01

    目的:分析腹腔镜辅助胃癌根治术的临床效果及可行性。方法:收集2010年1月-2012年3月在我院手术的82例胃癌患者资料,分为治疗组42例和对照组40例,其中治疗组患者接受腹腔镜手术、对照组患者接受开腹手术,比较两组患者的治疗效果。结果:治疗组患者的术中出血量、肠道功能恢复时间和住院时间均显著少于对照组(P均<0.05),而淋巴结清扫数和后期并发症则与对照组无显著差异。两组患者均无术中死亡病例。随访54个月,治疗组患者死亡4例、带瘤生存6例,对照组患者死亡5例、带瘤生存4例,也都无显著差异。结论:与开腹手术相比,腹腔镜辅助胃癌根治术的临床效果相似,但具有创伤较少、并发症较少、安全等优点,患者痊愈速度更快,可明显提高患者的生存质量以及预后,值得临床推广。%To further study the clinical effects and the feasibility of laparoscopy-assisted radical gastrectomy. Methods:The data on 82 cases of patients with gastric cancer, who received surgical operation from January 2010 to March 2012 in our hospital, were selected and divided into a treatment group with 42 cases and a control group with 40 cases. The patients received a laparoscopic surgery in the treatment group or laparotomy in the control group. The clinical effects were compare between two groups. Results:The intraoperative blood loss, the times for the intestinal function recovery and the hospital stay were signiifcantly less in the treatment group than in the control group (P<0.05) while the number of lymph node cleaning and late complications had no signiifcant difference between two groups. There was no intraoperative death case in two groups. There were 4 cases of death, 6 cases of survival with tumor in the treatment group while 5 and 4 in the control group during 54 months follow-up, which was also no signiifcant difference. Conclusion

  6. Application of two different gastrectomy methods in proximal gastric cancer%两种不同手术方式在近端胃癌根治术中的应用

    Institute of Scientific and Technical Information of China (English)

    欧阳杰; 李洪; 陈思远; 王力斌; 李爱辉; 刘铭; 余伟儇

    2015-01-01

    目的:探讨近端胃癌两种不同手术方式对患者术后生命质量、并发症和预后的影响。方法回顾性分析中山大学附属东华医院收治的102例近端胃癌患者临床资料,其中50例行近端胃癌根治性切除,残胃食管吻合(近端胃切除组);52例行全胃切除,食管空肠 Roux-en-Y 吻合(全胃切除组)。比较两组的术后并发症、营养指标以及预后情况。结果两组患者术后反流性食管炎比较,近端胃切除组与全胃切除组发生率分别为38.0%和19.2%,差异有统计学意义(χ2=4.464,P =0.035)。术后感染、出血、吻合口瘘发生率两组比较差异均无统计学意义(χ2=0.063,P =1.000;χ2=0.001,P =0.978;χ2=0.311,P =0.577)。术后1年两组血浆总蛋白分别为(65.26±4.10)g/L、(65.33±3.75)g/L,白蛋白分别为(39.76±2.17)g/L、(39.59±2.04)g/L,血 红 蛋白分别为(107.33 ± 11.10)g/L、(108.09±11.17)g/L,术后体重分别减轻1.00~8.00 kg、0.50~8.20 kg,两组比较差异均无统计学意义(t =-0.402,P =0.688;t =1.778,P =0.076;t =-1.502,P =0.133;t =-1.622,P =0.105)。术后随访时间7个月至10年,两组术后吻合口复发率分别为4.0%和5.8%,肿瘤远处转移发生率分别为24.0%和28.8%,差异均无统计学意义(χ2=0.171,P =0.679;χ2=0.308,P =0.579)。两组中位生存期分别为53.6个月和49.8个月,生存率比较差异无统计学意义(χ2=2.564,P =0.109)。结论与近端胃切除相比,全胃切除可有效减少术后反流性食管炎的发生,且不增加营养不良、肿瘤复发转移及死亡的发生率,是一种安全有效的手术方式。%Objective To evaluate the impacts of the two different gastrectomy methods on the quality

  7. Clinical effects of Yiqihuoxue decoction on remnant stomach paralysis syndrome after subtotal gastrectomy%益气活血汤治疗胃大部切除术后残胃瘫综合征的疗效观察

    Institute of Scientific and Technical Information of China (English)

    鲍艳芬; 周秀梅; 鲍书云; 赵文杰

    2010-01-01

    目的 探讨益气活血汤治疗胃大部切除术后残瘫胃综合征的临床疗效.方法 将44例患者随机分为两组各22例,对照组采用TPN肠外营养支持治疗,治疗组在对照组治疗基础上配合益气活血汤治疗,并施以有效的心理干预,治疗结束后评价疗效.结果 对照组总有效率为54.55%,治疗组为100.00%,两组总有效率比较,差异有统计学意义(P=0.00625<0.01).结论 益气活血汤配合TPN肠外营养治疗胃大部切除术后残胃瘫综合征,再施以有效的心理干预,疗效满意.%Objective To approach effect of Yiqihuoxue decoction on remnant stomach paralysis syndrome after subtotal gastrectomy. Methods A total of 44 patient of remnant stomach paralysis syndrome were randomly recruited into a control group and a treatment group, with 22 patients in each group. The control group was treated with TPN parenteral alimentation. On this basis, the treatment group was treated with Yiqihuoxue decoction and mental intervention. The clinical effects were observed in both groups after the treatment. Results The total effective rate was 54.55% and 100% in the control group and the treatment group respectively, showing statistic difference(P=0.00625 <0.01).Conclusion It was effective to treat remnant stomach paralysis syndrome with Yiqihuoxue decoction, TPN parenteral nutrition and mental intervention.

  8. Electronic band structure of beryllium oxide

    CERN Document Server

    Sashin, V A; Kheifets, A S; Ford, M J

    2003-01-01

    The energy-momentum resolved valence band structure of beryllium oxide has been measured by electron momentum spectroscopy (EMS). Band dispersions, bandwidths and intervalence bandgap, electron momentum density (EMD) and density of occupied states have been extracted from the EMS data. The experimental results are compared with band structure calculations performed within the full potential linear muffin-tin orbital approximation. Our experimental bandwidths of 2.1 +- 0.2 and 4.8 +- 0.3 eV for the oxygen s and p bands, respectively, are in accord with theoretical predictions, as is the s-band EMD after background subtraction. Contrary to the calculations, however, the measured p-band EMD shows large intensity at the GAMMA point. The measured full valence bandwidth of 19.4 +- 0.3 eV is at least 1.4 eV larger than the theory. The experiment also finds a significantly higher value for the p-to-s-band EMD ratio in a broad momentum range compared to the theory.

  9. 手术频率对腹腔镜胃癌根治术学习曲线的影响%The influence of surgical frequency on laparoscopic radical gastrectomy learning curve

    Institute of Scientific and Technical Information of China (English)

    耿良元; 白剑峰; 孙跃明; 陆文熊; 傅赞

    2012-01-01

    目的:探讨手术频率对于腹腔镜胃癌根治术学习曲线的影响.方法:回顾性分析由同一组甲医师(n=100例,月平均手术3.33例)、乙医师(n=90例,月平均手术2.50例)分别在2008年1月~2010年6月和2008年1月~2011年1月完成的腹腔镜胃癌根治手术.按照手术先后顺序,将甲医师组分为4阶段(A、B、C、D),每阶段25例,乙医师组分为6阶段(E、F、G、H、I、J),每阶段15例.分别比较甲、乙医师组内各阶段及甲乙医师两组的手术时间、术中出血量、术后住院天数、并发症、中转开腹数、淋巴结清扫数.结果:所有分组比较的手术患者年龄、性别、病理分期、手术方式上均具有可比性.甲医师组C、D阶段手术时间及出血量显著少于A、B阶段,乙医师组I、J阶段手术时间及出血量显著少于E、F、G、H阶段,各阶段间淋巴结清扫数、并发症、术后住院天数及中转开腹率差异无统计学意义.甲医师组手术时间显著少于乙医师组手术时间,甲医师组术中出血量显著少于乙医师组术中出血量,两者差异具有统计学意义,两医师组间淋巴结清扫数、中转开腹率、手术并发症差异无统计学意义.结论:当适当增加手术频率时,可以在较短的学习曲线下,更好地掌握腹腔镜胃癌根治术.%Objective;To investigate effects of surgery frequency on the laparoscopic radical gastrectomy learning curve. Methods; A retrospective analysis of the laparoscopic radical gastrectomy by the same physician group Ⅰ and Ⅱ , respectively, from January 2008 to June 2010 (n = 100) and from January 2008 to January 2011 (n = 90) ,the average monthly surgery rate was 3.33 and 2.50. I group was divided into four phases (A,B,C,D),each phase of 25 cases, Ⅱ group divided into six phases (E, F, G, H, I, J) , each phase of 15 cases. Operative time,blood loss,postoperative hospital stay,complications,laparotomy number,number of lymph node dissection were

  10. Application of right-to-lateral approach in laparoscopic-assisted radical gastrectomy%右侧入路在腹腔镜胃癌根治术中的应用

    Institute of Scientific and Technical Information of China (English)

    尤俊; 黄正接; 许林; 卢传辉; 刘凯华; 黄安乐; 李永文; 罗琪

    2014-01-01

    Objective To explore the technical feasibility,safety,and short-term clinical efficacy of right-to-lateral approach in laparoscopic-assisted radical gastrectomy.Methods Clinicopathological data of 178 gastric cancer patients undergoing laparoscopic-assisted radical gastrectomy,including 92 patients with right-to-lateral approach (R-LG group) and 86 cases with left-to-lateral approach (L-LG group),in our department from October 2010 to September 2013 were analyzed retrospectively.Short-term efficacy and complication morbidity were compared between R-LG group and L-LG group according to body mass index(BMI).Results For those patients with BMI≥24 kg/m2,the R-LG group (35 cases) had shorter mean operation time,less intraoperative blood loss,shorter painkiller used time than L-LG group(31 cases)[(227±17) min vs.(262±23) min,(73±9) ml vs.(84±8) ml and (2.1±0.1) d vs.(2.6±0.4) d,all P<0.05].The average time to ambulation and recovery time of peristalsis in the R-LG group were faster than those in L-LG group [(2.2±0.2) d vs.(2.8±0.6) d and (3.6±0.3) d vs.(4.2± 0.5) d,all P<0.05].The R-LG group had more dissected lymph nodes per patient (35±4) than the L-LG group (30±5) with significant difference (P<0.05).There were no significances in postoperative hospital stay,postoperative complication morbidity and hospitalization expenses between R-LG and L-LG group (all P>0.05).For those patients with BMI<24 kg/m2,there were no significant differences in all above parameters between R-LG group(57 cases) and L-LG group(55 cases).No mortality and recurrence was observed during follow-up of 3 to 24 months.Conclusion Right-to-lateral approach in laparoscopicassisted radical gastrectomy is a safe and feasible procedure,especially for the obesity patients,which can shorten the operation time,decrease intraoperative blood loss,lead to a faster postoperative recovery and harvest more lymph nodes as compared to L-LG procedure.%目的 探讨右侧入路应用于腹腔

  11. Microstructural banding effects clarified through micrographic digital image correlation

    International Nuclear Information System (INIS)

    Microstructural banding is commonly observed in commercial steels, but its effect on the global mechanical properties is still disputed in the literature. This letter investigates the influence of band morphology and banding phase properties from tensile tests for two limit cases (continuous hard band vs. discontinuous softer band), analysed from digital image correlation of in situ electron microscopy micrographs. The effects of band continuity and hardness are elucidated, yielding a clear detrimental influence especially for hard bands with a continuous morphology.

  12. Dual-band frequency selective surface with large band separation and stable performance

    Institute of Scientific and Technical Information of China (English)

    Zhou Hang; Xu Zhuo; Qu Shao-Bo; Peng Wei-Dong; Lin Bao-Qin; Wang Jia-Fu; Ma Hua; Zhang Jie-Qiu; Bai Peng; Wang Xu-Hua

    2012-01-01

    A new technique of designing a dual-band frequency selective surface with large band separation is presented.This technique is based on a delicately designed topology of L-and Ku-band microwave filters.The two band-pass responses are generated by a capacitively-loaded square-loop frequency selective surface and an aperture-coupled frequency selective surface,respectively.A Faraday cage is located between the two frequency selective surface structures to eliminate undesired couplings.Based on this technique,a dual-band frequency selective surface with large band separation is designed,which possesses large band separation,high selectivity,and stable performance under various incident angles and different polarizations.

  13. Rotational bands and chirality in 194Tl

    International Nuclear Information System (INIS)

    The high-spin states in 194Tl were studied using the 181Ta(18O, 5n) reaction and the AFRODITE γ -ray spectrometer at iThemba LABS. The level scheme of 194Tl was considerably extended with several new bands. Three negative-parity 4-quasiparticle bands were observed and associated with πh9/2 x νi13/2-3 configurations. Two of these form a candidate chiral pair with excellent near-degeneracy. In addition two new positive-parity bands were found. (orig.)

  14. Multi-band Modelling of Appearance

    DEFF Research Database (Denmark)

    Stegmann, Mikkel Bille; Larsen, Rasmus

    2003-01-01

    appearance of both derived feature bands and an intensity band. As a special case of feature-band augmented appearance modelling we propose a dedicated representation with applications to face segmentation. The representation addresses a major problem within face recognition by lowering the sensitivity to......Earlier work has demonstrated generative models capable of synthesising near photo-realistic grey-scale images of objects. These models have been augmented with colour information, and recently with edge information. This paper extends the active appearance model framework by modelling the...

  15. Multi-band Modelling of Appearance

    DEFF Research Database (Denmark)

    Stegmann, Mikkel Bille; Larsen, Rasmus

    2002-01-01

    appearance of both derived feature bands and an intensity band. As a special case of feature-band augmented appearance modelling we propose a dedicated representation with applications to face segmentation. The representation addresses a major problem within face recognition by lowering the sensitivity to......Earlier work has demonstrated generative models capable of synthesising near photo-realistic grey-scale images of objects. These models have been augmented with colour information, and recently with edge information. This paper extends the Active Appearance Model framework by modelling the...

  16. One-Dimensional Anisotropic Band Gap Structure

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    The band gap structure of one-dimensional anisotropic photonic crystal has been studied by means of the transfer matrix formalism. From the analytic expressions and numeric calculations we see some general characteristics of the band gap structure of anisotropic photonic crystals, each band separates into two branches and the two branches react to polarization sensitively. In the practical case of oblique incidence, gaps move towards high frequency when the angle of incidence increases. Under some special conditions, the two branches become degenerate again.

  17. The Novel Microwave Stop-Band Filter

    OpenAIRE

    Chernobrovkin, R. E.; Ivanchenko, I. V.; Korolev, A. M.; Popenko, N. A.; K. Yu. Sirenko

    2008-01-01

    The stop-band filter with the new band-rejection element is proposed. The element is a coaxial waveguide with the slot in the centre conductor. In the frame of this research, the numerical and experimental investigations of the amplitude-frequency characteristics of the filter are carried out. It is noted that according to the slot parameters the two typical resonances (half-wave and quarter-wave) can be excited. The rejection band of the single element is defined by the width, depth, and die...

  18. Asymmetric acoustic transmission in multiple frequency bands

    International Nuclear Information System (INIS)

    We report both experimentally and numerically that the multi-band device of the asymmetric acoustic transmission is realized by placing two periodic gratings with different periods on both sides of two brass plates immersed in water. The asymmetric acoustic transmission can exist in four frequency bands below 1500 kHz, which arises from the interaction between various diffractions from the two gratings and Lamb modes in the brass plates immersed in water. The results indicate that the device has the advantages of multiple band, broader bandwidth, and simpler structure. Our finding should have great potential applications in ultrasonic devices

  19. Deformed intruder band in 113I

    International Nuclear Information System (INIS)

    High-spin states in the neutron-deficient 113I nucleus have been investigated for the first time using the 58Ni(58Ni,3pγ) reaction. Gamma-ray coincidence data were acquired with the Eurogam spectrometer in conjunction with the Daresbury recoil mass separator. A deformed intruder band has been established extending to a spin approaching 40ℎ and excitation energy 30 MeV. A possible structure for the band is discussed. This is the first evidence for such a band in this mass region with Z>51

  20. Configurations of superdeformed bands in 193Pb

    International Nuclear Information System (INIS)

    The six superdeformed bands in 193Pb have been studied with the EUROGAM 2 γ-ray spectrometer using the 168Er(30Si,5n)193Pb reaction. The results are discussed in terms of Cranked-Hartree-Fock-Bogoliubov-Lipkin-Nogami calculations. The bands are interpreted as three pairs of signature partners based on quasineutron excitations. Dipole transitions linking two signature partner superdeformed bands have been observed and, for the first time in lead isotopes, the branching ratio has been extracted. (author)

  1. Chiral geometry in multiple chiral doublet bands

    CERN Document Server

    Zhang, Hao

    2015-01-01

    The chiral geometry of the multiple chiral doublet bands with identical configuration is discussed for different triaxial deformation parameters $\\gamma$ in the particle rotor model with $\\pi h_{11/2}\\otimes \

  2. Broadband V-band angular transition

    OpenAIRE

    Shcherbyna, Olga A.; Yashchyshyn, Yevhen

    2016-01-01

    A model of broadband V-band transition from a rectangular air-filled waveguide to substrate integrated waveguide has been proposed. Theoretical principles used for constructing the model of transition are also presented.

  3. Lake Louise waterfowl banding report, Alaska, 1954

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The report covers the Lake Louise, Alaska banding status. The itinerary for the project, study and methods are discussed. Brood observations are provided.

  4. The Novel Microwave Stop-Band Filter

    Directory of Open Access Journals (Sweden)

    R. E. Chernobrovkin

    2008-01-01

    Full Text Available The stop-band filter with the new band-rejection element is proposed. The element is a coaxial waveguide with the slot in the centre conductor. In the frame of this research, the numerical and experimental investigations of the amplitude-frequency characteristics of the filter are carried out. It is noted that according to the slot parameters the two typical resonances (half-wave and quarter-wave can be excited. The rejection band of the single element is defined by the width, depth, and dielectric filling of the slot. Fifth-order Chebyshev filter utilizing the aforementioned element is also synthesized, manufactured, and tested. The measured and simulated results are in good agreement. The experimental filter prototype exhibits the rejection band 0.86 GHz at the level −40 dB.

  5. Multiple band circularly polarized microstrip antenna

    Science.gov (United States)

    Yu, I. P. (Inventor)

    1980-01-01

    A multiple antenna assembly for communicating electromagnetic radiation is disclosed. An antenna element stack is constructed of a plurality of elliptical lamina antenna elements mutally separated by layers of dielectric material, and separated from a ground plane by dielectric material. The antenna assembly is coupled through a feed line in contact with the top antenna element. A conductor joins the remaining antenna elements to the ground plane. Each individual antenna element is operable for communication reception and transmission within a frequency band determined by the size of the particular antenna element. The sizes of the antenna elements may be selected to provide electromagnetic radiation communication over several distinct frequency bands, or to connect the individual bands into a broad band.

  6. New band-notched UWB antenna

    Institute of Scientific and Technical Information of China (English)

    HE Xiao-xiang; DENG Hong-wei

    2009-01-01

    A simple and compact ultra wideband (UWB) printed monopole antenna with band-notched performance is proposed in this paper. The antenna is partially grounded so that the Q value is depressed and the impedance bandwidth is broadened. A small strip bar is loaded on each arm of the similar U-shaped radiator. The impedance bandwidth of the antenna overlap with IEEE 802.11a is rejected consequently. The geometry parameters of the antenna are investigated and optimized with HFSS. The measured bandwidth of the proposed antenna occupies about 7.89 GHz covering from 3.05 GHz to 10.94 GHz with expected notched band from 4.96 GHz to 5.98 GHz. A quasi-omnidirectional and quasi-symmetrical radiation pattern in the whole band is also obtained. As a result, a UWB wireless communication system can be simplified with the band-notched UWB antenna presented.

  7. Shear banding in mesoscopic dusty plasma liquids

    International Nuclear Information System (INIS)

    We experimentally demonstrate shear banding and construct a microscopic dynamic picture of a sheared 2D mesoscopic dust Coulomb liquid at the kinetic level. Under the topological constraints from the discreteness and finite boundary, the nonlinear threshold-type response of motion to the local stress induced by thermal and external drives leads to shear thinning and the enhanced avalanche-type local topological transitions with stress relaxation in the form of clusters. It causes the formation of the outer shear bands in which the mean shear rate, the velocity fluctuations, and the structural rearrangement rate are all enhanced, and leaves a weakly perturbed center band. The typical size of the cooperative hopping vortex (about three interparticle distance) sets up a common length scale for the widths of the confinement induced layering and the shear band

  8. Experimental study on the adiabatic shear bands

    International Nuclear Information System (INIS)

    Four martensitic steels (Z50CDV5 steel, 28CND8 steel, 35NCDV16 steel and 4340 steel) with different hardness between 190 and 600 Hsub(B) (Brinell hardness), have been studied by means of dynamic compressive tests on split Hopkinson pressure bar. Microscopic observations show that the fracture are associated to the development of adiabatic shear bands (except 4340 steel with 190 Hsub(B) hardness). By means of tests for which the deformation is stopped at predetermined levels, the measurement of shear and hardness inside the band and the matrix indicates the chronology of this phenomenon: first the localization of shear, followed by the formation of adiabatic shear band and ultimatly crack initiation and propagation. These results correlated with few simulations by finite elements have permitted to suggest two mecanisms of deformation leading to the formation of adiabatic shear bands in this specific test

  9. Banded Householder representation of linear subspaces

    CERN Document Server

    Irving, Geoffrey

    2011-01-01

    We show how to compactly represent any $n$-dimensional subspace of $R^m$ as a banded product of Householder reflections using $n(m - n)$ floating point numbers. This is optimal since these subspaces form a Grassmannian space $Gr_n(m)$ of dimension $n(m - n)$. The representation is stable and easy to compute: any matrix can be factored into the product of a banded Householder matrix and a square matrix using two to three QR decompositions.

  10. Summing graphs for random band matrices

    OpenAIRE

    Silvestrov, P. G.

    1996-01-01

    A method of resummation of infinite series of perturbation theory diagrams is applied for studying the properties of random band matrices. The topological classification of Feynman diagrams, which was actively used in last years for matrix model regularization of 2d-gravity, turns out to be very useful for band matrices. The critical behavior at the edge of spectrum and the asymptotics of energy level correlation function are considered. This correlation function together with the hypothesis ...

  11. Collective dipole rotational bands in 197Pb

    International Nuclear Information System (INIS)

    The nucleus 197Pb was populated via the 186W(17O, 6n)197Pb reaction at beam energies of 98 and 110 MeV. Two regular ΔI=1 bands of magnetic dipole transitions have been found. Possible interpretations in terms of collective oblate configurations involving high-K proton orbitals coupled to three i13/2 neutrons are discussed. The similarities between several of the bands discovered in 197-200Pb nuclei are emphasized. (orig.)

  12. Development of Sintered Iron Driving Bands

    Directory of Open Access Journals (Sweden)

    R. P. Khanna

    1974-07-01

    Full Text Available The present investigation reports some detailed studies carried out on the development testing and proving of sintered Iron Driving Bands. Sintering studies on two different types of iron powders together with a few Fe-Cu compositions have been made and based on the results there of, parameters for development iron driving bands have been standardised. The results obtained clearly demonstrate that substitution of copper by sintered iron is highly practicable alternative.

  13. Dual-band Omnidirectional Circularly Polarized Antenna

    OpenAIRE

    Narbudowicz, Adam; Bao, Xiulong; Ammann, Max

    2013-01-01

    A dual-band omnidirectional circularly polarized antenna is proposed. The antenna comprises back-to-back microstrip patches fed by a coplanar waveguide. A very low frequency ratio of 1.182 has been achieved, which can be easily tuned by adjusting four lumped capacitors incorporated into the antenna. An analysis of the omnidirectional circular polarization mechanism as well the dual band operation is provided and confirmed by numerical and experimental data. Key parameters to tune the resonant...

  14. Exploring the thermodynamics of a rubber band

    Science.gov (United States)

    Roundy, David; Rogers, Michael

    2013-01-01

    We describe an upper-division experiment in thermal physics where students measure the tension of a rubber band as a function of temperature and length and use a Maxwell relation to find the change in internal energy and entropy for an isothermal stretch. This allows students to experimentally check the predictions of the entropic spring model for elastomers and observe that the entropy does indeed decrease as a rubber band is stretched.

  15. Amniotic Band Syndrome - A Dreaded Condition

    OpenAIRE

    R, Durga; Renukadevi, T. K.

    2016-01-01

    Amniotic band syndrome is a unique condition in which amnion a normal structure causes complications. A case of second gravid, obese who is a known diabetic came to OPD at 13 weeks pregnancy for regular antenatal check up. A routine ultrasonogram was advised in which multiple anomalies were noted and the diagnosis of amniotic band syndrome was made. The parents were counseled for medical termination of pregnancy and after obtaining the consent termination were performed and the parents were a...

  16. Band spectrum is D-brane

    CERN Document Server

    Hashimoto, Koji

    2015-01-01

    We show that band spectrum of topological insulators can be identified as the shape of D-branes in string theory. The identification is based on a relation between the Berry connection associated with the band structure and the ADHM/Nahm construction of solitons whose geometric realization is available with D-branes. We also show that chiral and helical edge states are identified as D-branes representing a noncommutative monopole.

  17. Lupus nephritis and lupus band test.

    OpenAIRE

    Adam, B. A.; Wang, F; Looi, L. M.; Prathap, K.

    1981-01-01

    Twenty-seven patients with histologically confirmed lupus nephritis were studied to identify the incidence of lupus band and its significance to histological patterns of nephritis and complement levels. It was found that the kidney involvement is 2.5 times more frequent in lupus band positive patients. The association of a positive lupus and low C3 level signifies the presence of diffuse proliferative glomerulonephritis rather than membranous glomerulonephritis. The results, together with ear...

  18. An empirical basis for Mach bands

    OpenAIRE

    Lotto, R. Beau; Williams, S. Mark; Purves, Dale

    1999-01-01

    Mach bands, the illusory brightness maxima and minima perceived at the initiation and termination of luminance gradients, respectively, are generally considered a direct perceptual manifestation of lateral inhibitory interactions among retinal or other lower order visual neurons. Here we examine an alternative explanation, namely that Mach bands arise as a consequence of real-world luminance gradients. In this first of two companion papers, we analyze the natural sources of luminance gradient...

  19. Intraluminal penetration of the band in patients with adjustable silicone gastric banding: radiological findings

    Energy Technology Data Exchange (ETDEWEB)

    Pretolesi, F.; Derchi, L.E. [Cattedra di Radiologia R, Univ. di Genova (Italy); Camerini, G.; Gianetta, E.; Marinari, G.M.; Scopinaro, N. [Semeiotica Chirurgica R, Univ. di Genova (Italy)

    2001-03-01

    The aim of this study was to analyse radiological findings in patients surgically treated for adjustable silicone gastric banding (ASGB) for morbid obesity complicated by band penetration into the gastric lumen. We reviewed the records of four patients with surgically confirmed penetration of gastric band into the gastric lumen; three had preoperative opaque meal, one only a plain abdominal film. Vomiting was the presenting symptom in two cases, whereas others had new weight gain and loss of early satiety. Two patients had normally closed bands: radiography showed that their position had changed from previous controls and the barium meal had passed out of their lumen. Two patients had an open band. One patient had the band at the duodeno-jejunal junction, and the tube connecting the band to the subcutaneous port presented a winding course suggesting the duodenum. In the other case, both plain film and barium studies failed to demonstrate with certainty the intragastric position of the band. As ASGB is becoming widely used, radiologists need to be familiar with its appearances and its complications. Band penetration into the stomach is a serious complication which needs band removal. Patients with this problem, often with non-specific symptoms and even those who are asymptomatic, are encountered during radiographic examinations requested either for gastric problems or follow-up purposes, and have to be properly diagnosed. (orig.)

  20. Intraluminal penetration of the band in patients with adjustable silicone gastric banding: radiological findings

    International Nuclear Information System (INIS)

    The aim of this study was to analyse radiological findings in patients surgically treated for adjustable silicone gastric banding (ASGB) for morbid obesity complicated by band penetration into the gastric lumen. We reviewed the records of four patients with surgically confirmed penetration of gastric band into the gastric lumen; three had preoperative opaque meal, one only a plain abdominal film. Vomiting was the presenting symptom in two cases, whereas others had new weight gain and loss of early satiety. Two patients had normally closed bands: radiography showed that their position had changed from previous controls and the barium meal had passed out of their lumen. Two patients had an open band. One patient had the band at the duodeno-jejunal junction, and the tube connecting the band to the subcutaneous port presented a winding course suggesting the duodenum. In the other case, both plain film and barium studies failed to demonstrate with certainty the intragastric position of the band. As ASGB is becoming widely used, radiologists need to be familiar with its appearances and its complications. Band penetration into the stomach is a serious complication which needs band removal. Patients with this problem, often with non-specific symptoms and even those who are asymptomatic, are encountered during radiographic examinations requested either for gastric problems or follow-up purposes, and have to be properly diagnosed. (orig.)

  1. Design of Compact Penta-Band and Hexa-Band Microstrip Antennas

    Science.gov (United States)

    Srivastava, Kunal; Kumar, Ashwani; Kanaujia, Binod K.

    2016-03-01

    This paper presents the design of two multi-band microstrip antennas. The antenna-1 gives Penta-Band and antenna-2 gives Hexa-band in the WLAN band. The frequency bands of the antenna-1 are Bluetooth 2.47 GHz (2.43 GHz-2.54 GHz), WiMax band 3.73 GHz (3.71 GHz-3.77 GHz), WLAN 5.1 GHz (4.99 GHz-5.13 GHz), upper WLAN 6.36 GHz (6.29 GHz-6.43 GHz), C band band 7.42 GHz (7.32 GHz-7.50 GHz) and the antenna-2 are WLAN band 2.6 GHz (2.56 GHz-2.63 GHz), 3.0 GHz (2.94 GHz-3.05 GHz), WiMax band 3.4 GHz (3.34 GHz-3.55 GHz), 4.85 GHz (4.81 GHz-4.92 GHz), WLAN 5.3 GHz (5.27 GHz-5.34 GHz) and upper WLAN 6.88 GHz. Both the antennas are fabricated and their measured results are presented to validate the simulated results. Proposed antennas have compact sizes and good radiation performances.

  2. Hyperspectral band selection based on parallel particle swarm optimization and impurity function band prioritization schemes

    Science.gov (United States)

    Chang, Yang-Lang; Liu, Jin-Nan; Chen, Yen-Lin; Chang, Wen-Yen; Hsieh, Tung-Ju; Huang, Bormin

    2014-01-01

    In recent years, satellite imaging technologies have resulted in an increased number of bands acquired by hyperspectral sensors, greatly advancing the field of remote sensing. Accordingly, owing to the increasing number of bands, band selection in hyperspectral imagery for dimension reduction is important. This paper presents a framework for band selection in hyperspectral imagery that uses two techniques, referred to as particle swarm optimization (PSO) band selection and the impurity function band prioritization (IFBP) method. With the PSO band selection algorithm, highly correlated bands of hyperspectral imagery can first be grouped into modules to coarsely reduce high-dimensional datasets. Then, these highly correlated band modules are analyzed with the IFBP method to finely select the most important feature bands from the hyperspectral imagery dataset. However, PSO band selection is a time-consuming procedure when the number of hyperspectral bands is very large. Hence, this paper proposes a parallel computing version of PSO, namely parallel PSO (PPSO), using a modern graphics processing unit (GPU) architecture with NVIDIA's compute unified device architecture technology to improve the computational speed of PSO processes. The natural parallelism of the proposed PPSO lies in the fact that each particle can be regarded as an independent agent. Parallel computation benefits the algorithm by providing each agent with a parallel processor. The intrinsic parallel characteristics embedded in PPSO are, therefore, suitable for parallel computation. The effectiveness of the proposed PPSO is evaluated through the use of airborne visible/infrared imaging spectrometer hyperspectral images. The performance of PPSO is validated using the supervised K-nearest neighbor classifier. The experimental results demonstrate that the proposed PPSO/IFBP band selection method can not only improve computational speed, but also offer a satisfactory classification performance.

  3. Analysis of shear banding in twelve materials

    Science.gov (United States)

    Batra, R. C.; Kim, C. H.

    The problem of the initiation and growth of shear bands in 12 different materials, namely, OFHC copper, Cartridge brass, Nickel 200, Armco IF (interstitial free) iron, Carpenter electric iron, 1006 steel, 2024-T351 aluminum, 7039 aluminum, low alloy steel, S-7 tool steel, Tungsten alloy, and Depleted Uranium (DU -0.75 Ti) is studied with the objectives of finding out when a shear band initiates, and upon what parameters does the band width depend. The nonlinear coupled partial differential equations governing the overall simple shearing deformations of a thermally softening viscoplastic block are analyzed. It is assumed that the thermomechanical response of these materials can be adequately represented by the Johnson-Cook law, and the only inhomogeneity present in the block is the variation in its thickness. The effect of the defect size on the initiation and subsequent growth of the band is also studied. It is found that, for each one of these 12 materials, the deformation has become nonhomogeneous by the time the maximum shear stress occurs. Also the band width, computed when the shear stress has dropped to 85 percent of its peak value, does not correlate well with the thermal conductivity of the material. The band begins to grow rapidly when the shear stress has dropped to 90 percent of its maximum value.

  4. Band reporting rates for mallards with reward bands of different dollar values

    Science.gov (United States)

    Robbins, C.S.

    1991-01-01

    Adult male mallards (Anas platyrhynchos ) were banded in summer 1987 with reward bands of different dollar values (0-$400) to determine the lowest dollar value that would yield a reporting rate approaching 1.0. During the 1987-88 and 1988-89 hunting seasons, rewards of between 50 and $100 were required to yield a reporting rate near 1.0. We estimated reporting rate of standard bands to be 0.32. Reward bands with 5 and $10 values produced reporting rates that were 1.5-2.0 times as large as those of standard bands. We developed a linear-logistic model to predict reporting rate as a function of the dollar value of reward bands.

  5. ISM band to U-NII band frequency transverter and method of frequency transversion

    Science.gov (United States)

    Stepp, Jeffrey David; Hensley, Dale

    2006-09-12

    A frequency transverter (10) and method for enabling bi-frequency dual-directional transfer of digitally encoded data on an RF carrier by translating between a crowded or otherwise undesirable first frequency band, such as the 2.4 GHz ISM band, and a less-crowded or otherwise desirable second frequency band, such as the 5.0 GHz 6.0 GHz U-NII band. In a preferred embodiment, the transverter (10) connects between an existing data radio (11) and its existing antenna (30), and comprises a bandswitch (12); an input RF isolating device (14); a transmuter (16); a converter (18); a dual output local oscillator (20); an output RF isolating device (22); and an antenna (24) tuned to the second frequency band. The bandswitch (12) allows for bypassing the transverter (10), thereby facilitating its use with legacy systems. The transmuter (14) and converter (16) are adapted to convert to and from, respectively, the second frequency band.

  6. Correlation of β-band with ground state band in medium mass nuclei

    International Nuclear Information System (INIS)

    The low energy levels of even Z even N nuclei in medium mass region A = 150-200 away from closed shells develop collective characteristics. The lowest levels can be grouped into three K-bands. The lowest one based on the ground state forms the ground state rotational band. The rotational band, based on the axially symmetric vibration of the nuclear core with K= 02 is called the beta vibrational band. The one based on the axially asymmetric vibration of the nuclear core with K=2 projection on the symmetry axis is called the K=2, γ-vibrational band. There is interest in the nature of the K= 02 band. This is called the geometric view of the Bohr Mottelson unified collective model

  7. Competition between triaxial bands and highly deformed intruder bands around 180Os

    International Nuclear Information System (INIS)

    Angular momentum alignment processes in nuclei around 180Os are discussed within the deformed shell model using the Woods-Saxon potential and the monopole pairing interaction. The crossings between bands of different structures are analysed and predictions are made for the possible observation of highly deformed intruder bands. Predictions of Q0 moments are presented for the highly deformed bands and tables of calculated deformations for 178-183Os are given. (orig.)

  8. Detection of the bright band with a vertically pointing k-band radar

    OpenAIRE

    Thomas Pfaff; Alexander Engelbrecht; Jochen Seidel

    2014-01-01

    Quantitative precipitation estimation based on weather radar data suffers from a variety of errors. During stratiform events, a region of enhanced reflectivity, called the bright band, leads to large positive biases in the precipitation estimates when compared with ground measurements. The identification of the bright band is an important step when trying to correct weather radar data for this effect. In this study we investigate three different methods to identify the bright band from profil...

  9. 1972 mourning dove banding: Clarence Cannon National Wildlife Refuge

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report summarizes mourning dove banding on Clarence Cannon NWR during the summer of 1972. A total of 500 doves were banded; a breakdown of the number banded...

  10. Search for superdeformed bands in 154Dy

    International Nuclear Information System (INIS)

    The island of superdeformation in the vicinity of the doubly magic 152Dy yrast superdeformed (SD) band is thought to be well understood in the framework of cranked mean field calculations. In particular, the calculations suggested that in 154Dy there should be no yrast or near yrast SD minimum in the 40-60 h spin range, where SD bands in this mass region are thought to be 153Dy nucleus, it is populated. However, with the presence of five SD bands in the neighboring necessary to ascertain if the addition of one single neutron diminishes the importance of shell effects to the extent that superdeformation can no longer be sustained. In an experiment utilizing the increased resolving power of the early implementation phase of Gammasphere, the reaction 122Sn(36S,4n) at 165 MeV was employed to populate high spin states in 154Dy. In a four-day run with 36 detectors, over one billion triple and higher fold coincidence events were recorded. One new SD band was identified and was assigned to 154Dy. From comparisons with the Im(2) moments of inertia of the SD bands in 152Dy and 153Dy, a configuration based on (514)9/22 neutrons coupled to the 152Dy SD core was proposed. One unexpected and as yet unexplained feature of this new SD band is that the transition energies are almost identical to those of an excited SD band in 153Dy. It is also worth noting that the feeding of the yrast states is similar to that achieved by the deexcitation from the ensemble of all entry states in the reaction. This observation emphasizes the statistical nature of the decay-out process. A paper reporting these results was accepted for publication

  11. Dual-band electromagnetic band gap structure for noise isolation in mixed signal SiP

    OpenAIRE

    Rotaru, M. D.; Sykulski, J. K.

    2010-01-01

    A compact dual-band electromagnetic band-gap (EBG) structure is proposed. It is shown through numerical simulation using 3D electromagnetic finite element modelling that by adding a slit to the classical mushroom shape an extra resonance is introduced and thus dual-band EBG structures can be built by cascading these new elements. It is also demonstrated that this novel approach can be used to isolate noise in a system such as a dual band transceiver integrated into a mixed signal system in a ...

  12. An Example of Suppression of Spurious Stop-Bands of EBG Band-Stop Filter

    Directory of Open Access Journals (Sweden)

    Dušan Nešić

    2011-12-01

    Full Text Available Based on the well known theory of infinite periodic structures, analytical theory of EBG (electromagnetic band gap cells suppressing 6 higher (spurious stop-bands is developed. Using such cells in a cascade the straight-forward procedure for design of the corresponding EBG band-stop filter is proposed, with possibility to control the width and the depth of the stop-band. The analytical theory is confirmed by the EM simulation of the filter realized in the microstrip technology.

  13. Design of Folded Multilayer Microstrip Tri-Band Hairpin Band Pass Filter

    OpenAIRE

    K. Vidhya; T. Jayanthy

    2013-01-01

    This study presents a novel approach for realizing miniaturized multi layer folded tri band micro-strip band pass filter for Wireless Local Area Network (WLAN) and Worldwide interoperatability for Microwave Access (WiMAX) applications. The proposed filter consists of a pair of folded hairpin stepped impedance resonators and pair of open loop resonators to achieve tri-band performance. The size of the folded micro-strip tri-band filter is reduced by nearly 60% due to the structural folding arr...

  14. Matched Quantization and Band Separation in a Direct Sampling Dual Band GNSS Receiver for Civil Aviation

    OpenAIRE

    Blais, Antoine; Macabiau, Christophe; Julien, Olivier

    2013-01-01

    This paper studies the application of the Direct Sampling technique to GNSS receivers dedicated to Civil Aviation usage. After a description of the specific spectral environment to be withstood by such receivers, two previously proposed architectures are reviewed. In the first one the E5a/L5 band and the E1/L1 band are sampled by a unique ADC, providing full coherency between bands. In the second architecture each band is sampled separately. The minimum sampling frequencies are also recalled ...

  15. Broadening of effective photonic band gaps in biological chiral structures: From intrinsic narrow band gaps to broad band reflection spectra

    Science.gov (United States)

    Vargas, W. E.; Hernández-Jiménez, M.; Libby, E.; Azofeifa, D. E.; Solis, Á.; Barboza-Aguilar, C.

    2015-09-01

    Under normal illumination with non-polarized light, reflection spectra of the cuticle of golden-like and red Chrysina aurigans scarabs show a structured broad band of left-handed circularly polarized light. The polarization of the reflected light is attributed to a Bouligand-type left-handed chiral structure found through the scarab's cuticle. By considering these twisted structures as one-dimensional photonic crystals, a novel approach is developed from the dispersion relation of circularly polarized electromagnetic waves traveling through chiral media, to show how the broad band characterizing these spectra arises from an intrinsic narrow photonic band gap whose spectral position moves through visible and near-infrared wavelengths.

  16. Impeller Die Casting Mould with Pre-returned Ejector Sleeve and Swing Block for Push-out%带预复位机构的推管和摆块推件的叶轮压铸模

    Institute of Scientific and Technical Information of China (English)

    李淑玉; 田福祥

    2012-01-01

    叶轮有8个叶片,叶片为薄且面积大的曲面,叶轮的轮毂对模具型芯包紧力较大,若推出机构不合理,容易引起工件变形甚至断裂,故采用8个摆块与1个推管的组合推件机构.分析了铸件的工艺性,论述了模具结构和工作过程.%There are 8 blades on an impellers, and the blades possess thin and large curved surface. Meanwhile, wheel of impellers exhibits a bigger wrapped force to the mould core. Unreasonable ejector design can result in the deformation or crack of the impeller. So 8 swing blocks and an ejector sleeve are adopted in push-out mechanism. The casting technology was analyzed, and mould structure and the operation process were described.

  17. Resolving the forbidden band of SF6.

    Science.gov (United States)

    Boudon, V; Manceron, L; Kwabia Tchana, F; Loëte, M; Lago, L; Roy, P

    2014-01-28

    Sulfur hexafluoride is an important molecule for modeling thermophysical and polarizability properties. It is also a potent greenhouse gas of anthropogenic origin, whose concentration in the atmosphere, although very low is increasing rapidly; its global warming power is mostly conferred by its strong infrared absorption in the ν3 S-F stretching region near 948 cm(-1). This heavy species, however, features many hot bands at room temperature (at which only 31% of the molecules lie in the ground vibrational state), especially those originating from the lowest, v6 = 1 vibrational state. Unfortunately, the ν6 band itself (near 347 cm(-1)), in the first approximation, is both infrared- and Raman-inactive, and no reliable spectroscopic information could be obtained up to now and this has precluded a correct modeling of the hot bands. It has been suggested theoretically and experimentally that this band might be slightly activated through Coriolis interaction with infrared-active fundamentals and appears in high pressure measurements as a very faint, unresolved band. Using a new cryogenic multipass cell with 93 m optical path length and regulated at 163 ± 2 K temperature, coupled to synchrotron radiation and a high resolution interferometer, the spectrum of the ν6 far-infrared region has been recorded. Low temperature was used to avoid the presence of hot bands. We are thus able to confirm that the small feature in this region, previously viewed at low-resolution, is indeed ν6. The fully resolved spectrum has been analyzed, thanks to the XTDS software package. The band appears to be activated by faint Coriolis interactions with the strong ν3 and ν4 fundamental bands, resulting in the appearance of a small first-order dipole moment term, inducing unusual selection rules. The band center (ν6 = 347.736707(35) cm(-1)) and rovibrational parameters are now accurately determined for the v6 = 1 level. The ν6 perturbation-induced dipole moment is estimated to be 33 ± 3

  18. Automated coregistration of MTI spectral bands.

    Energy Technology Data Exchange (ETDEWEB)

    Theiler, J. P. (James P.); Galbraith, A. E. (Amy E.); Pope, P. A. (Paul A.); Ramsey, K. A. (Keri A.); Szymanski, J. J. (John J.)

    2002-01-01

    In the focal plane of a pushbroom imager, a linear array of pixels is scanned across the scene, building up the image one row at a time. For the Multispectral Thermal Imager (MTI), each of fifteen different spectral bands has its own linear array. These arrays are pushed across the scene together, but since each band's array is at a different position on the focal plane, a separate image is produced for each band. The standard MTI data products resample these separate images to a common grid and produce coregistered multispectral image cubes. The coregistration software employs a direct 'dead reckoning' approach. Every pixel in the calibrated image is mapped to an absolute position on the surface of the earth, and these are resampled to produce an undistorted coregistered image of the scene. To do this requires extensive information regarding the satellite position and pointing as a function of time, the precise configuration of the focal plane, and the distortion due to the optics. These must be combined with knowledge about the position and altitude of the target on the rotating ellipsoidal earth. We will discuss the direct approach to MTI coregistration, as well as more recent attempts to 'tweak' the precision of the band-to-band registration using correlations in the imagery itself.

  19. Automated coregistration of MTI spectral bands

    Science.gov (United States)

    Theiler, James P.; Galbraith, Amy E.; Pope, Paul A.; Ramsey, Keri A.; Szymanski, John J.

    2002-08-01

    In the focal plane of a pushbroom imager, a linear array of pixels is scanned across the scene, building up the image one row at a time. For the Multispectral Thermal Imager (MTI), each of fifteen different spectral bands has its own linear array. These arrays are pushed across the scene together, but since each band's array is at a different position on the focal plane, a separate image is produced for each band. The standard MTI data products (LEVEL1B_R_COREG and LEVEL1B_R_GEO) resample these separate images to a common grid and produce coregistered multispectral image cubes. The coregistration software employs a direct ``dead reckoning' approach. Every pixel in the calibrated image is mapped to an absolute position on the surface of the earth, and these are resampled to produce an undistorted coregistered image of the scene. To do this requires extensive information regarding the satellite position and pointing as a function of time, the precise configuration of the focal plane, and the distortion due to the optics. These must be combined with knowledge about the position and altitude of the target on the rotating ellipsoidal earth. We will discuss the direct approach to MTI coregistration, as well as more recent attempts to tweak the precision of the band-to-band registration using correlations in the imagery itself.

  20. Progressive band processing for hyperspectral imaging

    Science.gov (United States)

    Schultz, Robert C.

    Hyperspectral imaging has emerged as an image processing technique in many applications. The reason that hyperspectral data is called hyperspectral is mainly because the massive amount of information provided by the hundreds of spectral bands that can be used for data analysis. However, due to very high band-to-band correlation much information may be also redundant. Consequently, how to effectively and best utilize such rich spectral information becomes very challenging. One general approach is data dimensionality reduction which can be performed by data compression techniques, such as data transforms, and data reduction techniques, such as band selection. This dissertation presents a new area in hyperspectral imaging, to be called progressive hyperspectral imaging, which has not been explored in the past. Specifically, it derives a new theory, called Progressive Band Processing (PBP) of hyperspectral data that can significantly reduce computing time and can also be realized in real-time. It is particularly suited for application areas such as hyperspectral data communications and transmission where data can be communicated and transmitted progressively through spectral or satellite channels with limited data storage. Most importantly, PBP allows users to screen preliminary results before deciding to continue with processing the complete data set. These advantages benefit users of hyperspectral data by reducing processing time and increasing the timeliness of crucial decisions made based on the data such as identifying key intelligence information when a required response time is short.

  1. Laboratory Investigation of the Airglow Bands

    Science.gov (United States)

    Drouin, Brian; Yu, Shanshan; Crawford, Timothy J.; Miller, Charles E.; Yee, Jeng-Hwa

    2013-06-01

    We report the first high spectral resolution laboratory measurements of oxygen A-band night glow simulated using a static discharge cell. Our static discharge system reproduces the conditions of the mesospheric oxygen night glow - suggesting O(^1D) + O_2 as the primary source of the emission. Additionally, use of the static cell has enabled us to collect spectra for rare molecular oxygen isotopologues using isotopically enriched samples. The (0,0), (0,1), and (1,1) b-Xvibrational bands were observed with a Bruker 125 HR for all six isotopologues. The (1,2) and (2,2) bands were observed also for the main isotopologue. The frequencies of the observed (0,1) transitions resolved discrepancies in Raman data for (16-17, 17-17, and 17-18), enabling us to improve the vibrational parameterization of the ground electronic state in the global fit of Yu et al. Rotationally resolved intensities were determined for the (0,0), (0,1) and (1,1) bands. The experimental band intensity ratios I(0,0)/I(0,1) = 13.6 and I(0,0)/I(1,1) = 60 are in excellent agreement with the recent mesospheric remote sensing data. S. Yu, C.E. Miller, B.J. Drouin, H.S.P. Müller, J. Chem. Phys. 136, 024304, 2012

  2. Chiral geometry in multiple chiral doublet bands

    Science.gov (United States)

    Zhang, Hao; Chen, Qibo

    2016-02-01

    The chiral geometry of multiple chiral doublet bands with identical configuration is discussed for different triaxial deformation parameters γ in the particle rotor model with . The energy spectra, electromagnetic transition probabilities B(M1) and B(E2), angular momenta, and K-distributions are studied. It is demonstrated that the chirality still remains not only in the yrast and yrare bands, but also in the two higher excited bands when γ deviates from 30°. The chiral geometry relies significantly on γ, and the chiral geometry of the two higher excited partner bands is not as good as that of the yrast and yrare doublet bands. Supported by Plan Project of Beijing College Students’ Scientific Research and Entrepreneurial Action, Major State 973 Program of China (2013CB834400), National Natural Science Foundation of China (11175002, 11335002, 11375015, 11461141002), National Fund for Fostering Talents of Basic Science (NFFTBS) (J1103206), Research Fund for Doctoral Program of Higher Education (20110001110087) and China Postdoctoral Science Foundation (2015M580007)

  3. Collective Band Structures in Neutron-Rich 108Mo Nucleus

    Institute of Scientific and Technical Information of China (English)

    DING Huai-Bo; WANG Jian-Guo; XU Qiang; ZHU Sheng-Jiang; J. H. Hamilton; A. V. Ramayya; J. K. Hwang; Y. X. Luo; J. O. Rasmussen; I. Y. Lee; CHE Xing-Lai

    2007-01-01

    High spin states in the neutron-rich 108Mo nucleus are studied by measuring prompt γ-rays following the spontaneous fission of 252Cf with a Gammasphere detector array. The ground-state band is confirmed, and the one-phonon γ-vibrational band is updated with spin up to 12 h. A new collective band with the band head level at 1422.4 keV is suggested as a two-phonon γ-vibrational band. Another new band is proposed as a two-quasi-proton excitation band. Systematic characteristics of the collective bands are discussed.

  4. Band-Gap and Band-Edge Engineering of Multicomponent Garnet Scintillators from First Principles

    Science.gov (United States)

    Yadav, Satyesh K.; Uberuaga, Blas P.; Nikl, Martin; Jiang, Chao; Stanek, Christopher R.

    2015-11-01

    Complex doping schemes in R3 Al5 O12 (where R is the rare-earth element) garnet compounds have recently led to pronounced improvements in scintillator performance. Specifically, by admixing lutetium and yttrium aluminate garnets with gallium and gadolinium, the band gap is altered in a manner that facilitates the removal of deleterious electron trapping associated with cation antisite defects. Here, we expand upon this initial work to systematically investigate the effect of substitutional admixing on the energy levels of band edges. Density-functional theory and hybrid density-functional theory (HDFT) are used to survey potential admixing candidates that modify either the conduction-band minimum (CBM) or valence-band maximum (VBM). We consider two sets of compositions based on Lu3 B5O12 where B is Al, Ga, In, As, and Sb, and R3Al5 O12 , where R is Lu, Gd, Dy, and Er. We find that admixing with various R cations does not appreciably affect the band gap or band edges. In contrast, substituting Al with cations of dissimilar ionic radii has a profound impact on the band structure. We further show that certain dopants can be used to selectively modify only the CBM or the VBM. Specifically, Ga and In decrease the band gap by lowering the CBM, while As and Sb decrease the band gap by raising the VBM, the relative change in band gap is quantitatively validated by HDFT. These results demonstrate a powerful approach to quickly screen the impact of dopants on the electronic structure of scintillator compounds, identifying those dopants which alter the band edges in very specific ways to eliminate both electron and hole traps responsible for performance limitations. This approach should be broadly applicable for the optimization of electronic and optical performance for a wide range of compounds by tuning the VBM and CBM.

  5. High spin band structure in 139Nd

    Institute of Scientific and Technical Information of China (English)

    XU Qiang; ZHU Sheng-Jiang; CHE Xing-Lai; DING Huai-Bo; GU Long; ZHU Li-Hua; WU Xiao-Guang; LIU Ying; HE Chuang-Ye; LI Li-Hua; PAN Bo; HAO Xin; LI Guang-Sheng

    2009-01-01

    High-spin states in 139Nd nucleus have been reinvestigated with the reaction 128Te (16O, 5n) at a beam energy of 90 MeV. The level scheme has been expanded with spin up to 47/2 h. At the low spin states,the yrast collective structure built on the vh(-1)(11/2) multiplet shows a transitional shape with γ≈32° according to calculations of the triaxial rotor-plus-particle model. Three collective oblate bands with γ~-60° at the high spin states were identified for the first time. A band crossing is observed around hw ~0.4 MeV in one oblate band based on the 25/2- level.

  6. Simplicial band depth for multivariate functional data

    KAUST Repository

    López-Pintado, Sara

    2014-03-05

    We propose notions of simplicial band depth for multivariate functional data that extend the univariate functional band depth. The proposed simplicial band depths provide simple and natural criteria to measure the centrality of a trajectory within a sample of curves. Based on these depths, a sample of multivariate curves can be ordered from the center outward and order statistics can be defined. Properties of the proposed depths, such as invariance and consistency, can be established. A simulation study shows the robustness of this new definition of depth and the advantages of using a multivariate depth versus the marginal depths for detecting outliers. Real data examples from growth curves and signature data are used to illustrate the performance and usefulness of the proposed depths. © 2014 Springer-Verlag Berlin Heidelberg.

  7. Band structure engineering in organic semiconductors.

    Science.gov (United States)

    Schwarze, Martin; Tress, Wolfgang; Beyer, Beatrice; Gao, Feng; Scholz, Reinhard; Poelking, Carl; Ortstein, Katrin; Günther, Alrun A; Kasemann, Daniel; Andrienko, Denis; Leo, Karl

    2016-06-17

    A key breakthrough in modern electronics was the introduction of band structure engineering, the design of almost arbitrary electronic potential structures by alloying different semiconductors to continuously tune the band gap and band-edge energies. Implementation of this approach in organic semiconductors has been hindered by strong localization of the electronic states in these materials. We show that the influence of so far largely ignored long-range Coulomb interactions provides a workaround. Photoelectron spectroscopy confirms that the ionization energies of crystalline organic semiconductors can be continuously tuned over a wide range by blending them with their halogenated derivatives. Correspondingly, the photovoltaic gap and open-circuit voltage of organic solar cells can be continuously tuned by the blending ratio of these donors. PMID:27313043

  8. Obituary: David L. Band (1957-2009)

    Science.gov (United States)

    Cominsky, Lynn

    2011-12-01

    David L. Band, of Potomac Maryland, died on March 16, 2009 succumbing to a long battle with spinal cord cancer. His death at the age of 52 came as a shock to his many friends and colleagues in the physics and astronomy community. Band showed an early interest and exceptional aptitude for physics, leading to his acceptance at the Massachusetts Institute of Technology as an undergraduate student in 1975. After graduating from MIT with an undergraduate degree in Physics, Band continued as a graduate student in Physics at Harvard University. His emerging interest in Astrophysics led him to the Astronomy Department at the Harvard Smithsonian Center for Astrophysics (CfA), where he did his dissertation work with Jonathan Grindlay. His dissertation (1985) entitled "Non-thermal Radiation Mechanisms and Processes in SS433 and Active Galactic Nuclei" was "pioneering work on the physics of jets arising from black holes and models for their emission, including self-absorption, which previewed much to come, and even David's own later work on Gamma-ray Bursts," according to Grindlay who remained a personal friend and colleague of Band's. Following graduate school, Band held postdoctoral positions at the Lawrence Livermore Laboratory, the University of California at Berkeley and the Center for Astronomy and Space Sciences at the University of California San Diego where he worked on the BATSE experiment that was part of the Compton Gamma Ray Observatory (CGRO), launched in 1991. BATSE had as its main objective the study of cosmic gamma-ray bursts (GRBs) and made significant advances in this area of research. Band became a world-renowned figure in the emerging field of GRB studies. He is best known for his widely-used analytic form of gamma-ray burst spectra known as the "Band Function." After the CGRO mission ended, Band moved to the Los Alamos National Laboratory where he worked mainly on classified research but continued to work on GRB energetics and spectra. When NASA planned

  9. Mermaid syndrome with amniotic band disruption.

    Science.gov (United States)

    Managoli, Sanjeev; Chaturvedi, Pushpa; Vilhekar, Krishna Y; Iyenger, Janaki

    2003-01-01

    An association of Amniotic Band Disruption Sequence and Mermaid Syndrome in a newborn having multiple congenital anomalies is being reported. The newborn had aberrant string like tissues attached to the amputed fingers and toes. Adhesions of amniotic bands had disrupted the fetal parts especially anteriorly in the midline, causing multiple anomalies. Apart from these features of Amniotic Band Disruption Sequence, the newborn had complete fusion of the lower limbs by cutaneous tissue, a characteristic of Mermaid Syndrome (Sirenomelia). Associated malformations were anal stenosis, rectal atresia, small horseshoe kidney, hypoplastic urinary bladder and a bicomuate uterus. The single umbilical artery had a high origin, arising directly from the aorta just distal to the celiac axis, which is unique to sirenomelia. Theories put forward regarding the etiopathogenesis of both the conditions are discussed. PMID:12619964

  10. Development of S-band accelerating structure

    International Nuclear Information System (INIS)

    In Pohang Accelerator Laboratory (PAL) in Korea construction of XFEL (X-ray Free electron Lazar) institution is under construction aiming at the completion in 2014. Energy 10 GeV of the linac part of this institution and main frequency are planned in S-band (2856 MHz), and about 178 S-band 3m accelerating structures are due to be used for this linac. The oscillation of an X-ray laser requires very low emittance electron beam. On the other hand, since the accelerating structure which accelerates an electron beam has a feed port of microwave (iris), the electromagnetic field asymmetry of the microwave feeding device called coupler worsens the emittance of an electron beam. MHI manufactured two kinds of S-band accelerating structures with which the electromagnetic field asymmetry of coupler cavity was compensated for PALXFEL linac. We report these accelerating structures. (author)

  11. γ Vibrational Band in 70Ge

    Science.gov (United States)

    Morrow, S. I.; Haring-Kaye, R. A.; Elder, R. M.; Tabor, S. L.; Tripathi, V.; Bender, P. C.; Medina, N. H.; Allegro, P.; Döring, J.

    2013-10-01

    Excited states in 70Ge were populated by the 55Mn(18O, p 2 n) fusion-evaporation reaction at 50 MeV performed at Florida State University. Prompt γ- γ coincidences were measured with a Compton-suppressed Ge array consisting of three Clover detectors and seven single-crystal detectors. Examination of the resulting coincidence relations and relative intensity measurements led to an enhanced 70Ge level scheme, including an extension of the proposed γ vibrational band by four new states. Interpretation of the γ band within the context of the staggering parameter S (I) suggests a γ-soft structure, similar to other light Ge isotopes. Total Routhian Surface calculations for the ground-state band are consistent with a picture of γ softness at low spin. This work was supported by the National Science Foundation.

  12. Three Magnetic Rotation Bands in 84^Rb

    CERN Document Server

    Shen, Shuifa; Han, Guangbing; Wen, Shuxian; Yan, Yupeng; Wu, Xiaoguang; Zhu, Lihua; He, Chuangye; Li, Guangsheng

    2016-01-01

    High-spin states in $^{84}$Rb are studied by using the $^{70}$Zn($^{18}$O, p3n)$^{84}$Rb reaction at beam energy of 75 MeV. Three high-lying negative-parity bands are established, whose level spacings are very regular, i.e., there don't exist signature splitting. The dipole character of the transitions of these three bands is assigned by the $\\gamma$-$\\gamma$ directional correlations of oriented states (DCO) intensity ratios and the multipolarity M1 is suggested by the analogy to multiparticle excitations in neighboring nuclei. The strong M1 and weak or no E2 transitions are observed. All these characteristic features show they are magnetic rotation bands.

  13. Band-gap and band-edge engineering of multicomponent garnet scintillators from first principles

    Czech Academy of Sciences Publication Activity Database

    Yadav, S.K.; Uberuaga, B.P.; Nikl, Martin; Jiang, C.; Stanek, C.R.

    2015-01-01

    Roč. 4, č. 5 (2015), "054012-1"-"054012-9". ISSN 2331-7019 R&D Projects: GA ČR GAP204/12/0805 Institutional support: RVO:68378271 Keywords : scintillator * electronic band gap structure * garnets * band gap engineering Subject RIV: BM - Solid Matter Physics ; Magnetism

  14. Fuzzy Riesz subspaces, fuzzy ideals, fuzzy bands and fuzzy band projections

    OpenAIRE

    Hong Liang

    2015-01-01

    Fuzzy ordered linear spaces, Riesz spaces, fuzzy Archimedean spaces and $\\sigma$-complete fuzzy Riesz spaces were defined and studied in several works. Following the efforts along this line, we define fuzzy Riesz subspaces, fuzzy ideals, fuzzy bands and fuzzy band projections and establish their fundamental properties.

  15. Design of Microstrip Band Pass Fractal Filter for Suppression of Spurious Band

    Directory of Open Access Journals (Sweden)

    P. K. Singhal

    2008-12-01

    Full Text Available In this paper, the design and subsequent fabrication of a hairpin-line band pass filter has been proposed. This filter exhibits periodic frequency response. By proper design, the spurious bands are being suppressed significantly through the implementation of Koch fractal on the microstrip coupled line.

  16. S-band active array filtenna with enhanced X-band spurious interference suppression

    NARCIS (Netherlands)

    Cifola, L.; Gerini, G.; Berg, S. van den; Water, F. van de

    2014-01-01

    In the present work, the design of an S-band active array antenna with inherent frequency selectivity properties is described. The radiating element, based on a stacked-patch configuration, is characterized by an operational bandwidth of [2.8-3.4] GHz. In-band frequency selectivity is performed by a

  17. Wide band-gap nanostructure based devices

    OpenAIRE

    Chen, Xinyi; 陈辛夷

    2012-01-01

    Wide band gap based nanostructures have being attracting much research interest because of their promise for application in optoelectronic devices. Among those wide band gap semiconductors, gallium nitride (GaN) and zinc oxide (ZnO) are the most commonly studied and optoelectronic devices based on GaN and ZnO have been widely investigated. This thesis concentrates on the growth, optical and electrical properties of GaN and ZnO nanostructures, plus their application in solar cells and light e...

  18. Split Hubbard bands at low densities

    Science.gov (United States)

    Hansen, Daniel; Perepelitsky, Edward; Shastry, B. Sriram

    2011-05-01

    We present a numerical scheme for the Hubbard model that throws light on the rather esoteric nature of the upper and lower Hubbard bands, which have been invoked often in literature. We present a self-consistent solution of the ladder-diagram equations for the Hubbard model, and show that these provide, at least in the limit of low densities of particles, a vivid picture of the Hubbard split bands. We also address the currently topical problem of decay of the doublon states that are measured in optical trap studies, using both the ladder scheme and also an exact two-particle calculation of a relevant Green’s function.

  19. Band theory of metals the elements

    CERN Document Server

    Altmann, Simon L

    1970-01-01

    Band Theory of Metals: The Elements focuses on the band theory of solids. The book first discusses revision of quantum mechanics. Topics include Heisenberg's uncertainty principle, normalization, stationary states, wave and group velocities, mean values, and variational method. The text takes a look at the free-electron theory of metals, including heat capacities, density of states, Fermi energy, core and metal electrons, and eigenfunctions in three dimensions. The book also reviews the effects of crystal fields in one dimension. The eigenfunctions of the translations; symmetry operations of t

  20. Planar Tri-Band Antenna Design

    Directory of Open Access Journals (Sweden)

    M. Pokorny

    2008-04-01

    Full Text Available The paper briefly uncovers techniques used for a design of compact planar antennas in order to achieve the wideband and the multi-band capability. The main topic is aimed to the multi-objective optimization using genetic algorithms. A quarter-wavelength planar inverted-F antenna (PIFA using a slot and shorted parasitic patches is chosen to cover GSM900, GSM1800 and ISM2400 bands. A global multi-objective optimization uses a binary genetic algorithm with a composite objective function to tune this antenna. The impedance match and the direction of maximum gain are desired parameters to improve.